Wentworth's Plane and Solid Geometry: teaching guides on Teddy Rook Bookhttps://teddyrookbook.com/homeschool/geometry/wentworth/Recent content in Wentworth's Plane and Solid Geometry: teaching guides on Teddy Rook BookTeddy Rook Bookhttps://teddyrookbook.com/img/share.jpghttps://teddyrookbook.com/img/share.jpgHugoenSun, 11 Oct 2026 00:00:00 +0000Lesson 1: Solids, surfaces, lines and pointshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-1/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-1/Lesson 10: Triangles and the sum of their angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-10/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-10/Lesson 100: Parallel sections of a pyramid; the pyramid as a limithttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-100/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-100/Lesson 101: The volume of a pyramidhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-101/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-101/Lesson 102: Problems of computation: pyramidshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-102/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-102/Lesson 103: The frustum of a pyramidhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-103/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-103/Lesson 104: Pyramids with a common trihedral angle; the truncated prismhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-104/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-104/Lesson 105: Euler's theorem; the sum of the face angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-105/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-105/Lesson 106: Similar polyhedronshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-106/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-106/Lesson 107: The five regular polyhedronshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-107/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-107/Lesson 108: Cylindershttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-108/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-108/Lesson 109: Area and volume of a cylinderhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-109/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-109/Lesson 11: Sides of a triangle, and two ways triangles are equalhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-11/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-11/Lesson 110: Problems of computation: cylindershttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-110/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-110/Lesson 111: Coneshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-111/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-111/Lesson 112: Area and volume of a conehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-112/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-112/Lesson 113: The frustum of a conehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-113/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-113/Lesson 114: The prismatoid formulahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-114/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-114/Lesson 115: Frustums of pyramids and of coneshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-115/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-115/Lesson 116: Equivalent solidshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-116/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-116/Lesson 117: Similar solidshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-117/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-117/Lesson 118: The sphere and its circleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-118/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-118/Lesson 119: Poles and polar distance; measuring a material spherehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-119/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-119/Lesson 12: Isosceles triangles, three sides, and right triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-12/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-12/Lesson 120: Tangent planes; inscribed and circumscribed sphereshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-120/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-120/Lesson 121: Spherical angles and spherical polygonshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-121/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-121/Lesson 122: Polar triangles and the angle sum of a spherical trianglehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-122/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-122/Lesson 123: Bi-rectangular and symmetrical spherical triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-123/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-123/Lesson 124: Equal and symmetrical spherical triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-124/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-124/Lesson 125: Unequal sides and angles; the shortest path on a spherehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-125/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-125/Lesson 126: Zones and the surface of a spherehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-126/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-126/Lesson 127: Areas of lunes, spherical triangles and polygonshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-127/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-127/Lesson 128: Volume of a sphere, sector and segmenthttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-128/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-128/Lesson 129: Numerical exercises: surfaceshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-129/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-129/Lesson 13: Unequal sides and unequal angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-13/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-13/Lesson 130: Numerical exercises: volumeshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-130/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-130/Lesson 131: Miscellaneous exercises (1)https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-131/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-131/Lesson 132: Miscellaneous exercises (2)https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-132/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-132/Lesson 133: The parabolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-133/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-133/Lesson 134: Ordinates and tangents of the parabolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-134/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-134/Lesson 135: Tangents from a point; diameters of the parabolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-135/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-135/Lesson 136: The area of a parabolic segment; the parabola as a section of a conehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-136/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-136/Lesson 137: Exercises on the parabolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-137/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-137/Lesson 138: The ellipsehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-138/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-138/Lesson 139: Symmetry, focal radii and the auxiliary circlehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-139/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-139/Lesson 14: Loci: the perpendicular bisector and the angle bisectorhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-14/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-14/Lesson 140: Inside and outside; tangents of the ellipsehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-140/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-140/Lesson 141: Tangents at corresponding points; conjugate diametershttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-141/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-141/Lesson 142: Area of an ellipse; the ellipse as a section of a conehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-142/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-142/Lesson 143: Exercises on the ellipsehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-143/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-143/Lesson 144: The hyperbolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-144/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-144/Lesson 145: Symmetry and ordinates of the hyperbolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-145/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-145/Lesson 146: Tangents of the hyperbolahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-146/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-146/Lesson 147: Asymptotes; the hyperbola as a section of a conehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-147/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-147/Lesson 148: Review: the table of formulashttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-148/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-148/Lesson 15: Quadrilaterals and parallelogramshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-15/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-15/Lesson 16: More on parallelograms, and parallels cutting equal partshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-16/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-16/Lesson 17: Polygons and the sum of their angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-17/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-17/Lesson 18: Symmetry, and a review of Book Ihttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-18/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-18/Lesson 19: Methods of proving theoremshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-19/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-19/Lesson 2: Proofs, axioms, theorems and the general axiomshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-2/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-2/Lesson 20: Original exercises on angles and triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-20/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-20/Lesson 21: Original exercises on quadrilateralshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-21/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-21/Lesson 22: The circle: definitionshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-22/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-22/Lesson 23: Central angles, arcs and chordshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-23/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-23/Lesson 24: Chords and their distance from the centrehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-24/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-24/Lesson 25: Tangents, parallels, and the circle through three pointshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-25/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-25/Lesson 26: Tangents from a point, and two circleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-26/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-26/Lesson 27: Measurement, ratio and the theory of limitshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-27/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-27/Lesson 28: Finding a ratio, and angles measured by arcshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-28/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-28/Lesson 29: Inscribed angles and angles made by chords, tangents and secantshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-29/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-29/Lesson 3: Lines, planes and the straight linehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-3/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-3/Lesson 30: Review of Book II and theorems on the circlehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-30/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-30/Lesson 31: More theorems on circleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-31/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-31/Lesson 32: First constructions: perpendiculars and bisectinghttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-32/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-32/Lesson 33: Copying angles, parallels and dividing a linehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-33/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-33/Lesson 34: Constructing triangles and parallelogramshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-34/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-34/Lesson 35: Circles about and in triangles; tangentshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-35/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-35/Lesson 36: How to solve a construction problemhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-36/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-36/Lesson 37: Loci and locating pointshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-37/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-37/Lesson 38: Constructing triangles and squares from given partshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-38/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-38/Lesson 39: Constructions with quadrilaterals and tangent circleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-39/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-39/Lesson 4: Angles and how they are measuredhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-4/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-4/Lesson 40: Proportion: first theoremshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-40/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-40/Lesson 41: Proportion: composition, division and morehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-41/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-41/Lesson 42: A line parallel to a side of a trianglehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-42/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-42/Lesson 43: The bisector of an angle of a trianglehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-43/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-43/Lesson 44: Similar polygons and similar triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-44/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-44/Lesson 45: More similar triangles: parallel sides, altitudes, transversalshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-45/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-45/Lesson 46: Perimeters, and polygons divided into triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-46/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-46/Lesson 47: Original theorems on similar figureshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-47/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-47/Lesson 48: The right triangle and the Pythagorean theoremhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-48/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-48/Lesson 49: Squares of sides in any triangle; medianshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-49/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-49/Lesson 5: Straight angles, supplements and vertical angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-5/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-5/Lesson 50: Chords, secants, tangents and bisectorshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-50/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-50/Lesson 51: Original theorems on lines in circles and triangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-51/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-51/Lesson 52: Constructing proportional lineshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-52/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-52/Lesson 53: Mean proportional, extreme and mean ratio, similar polygonshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-53/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-53/Lesson 54: Construction problems with proportionshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-54/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-54/Lesson 55: Problems of computation (1)https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-55/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-55/Lesson 56: Problems of computation (2)https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-56/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-56/Lesson 57: Areas of rectangleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-57/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-57/Lesson 58: Parallelograms, triangles and trapezoidshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-58/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-58/Lesson 59: Similar figures and the square on the hypotenusehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-59/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-59/Lesson 6: Perpendiculars: equal obliques and the shortest linehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-6/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-6/Lesson 60: Original theorems on areashttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-60/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-60/Lesson 61: Constructing squares and triangles of given areahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-61/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-61/Lesson 62: Squares equal to parallelograms; two lines from sum or difference and producthttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-62/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-62/Lesson 63: Similar polygons of given sizehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-63/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-63/Lesson 64: Transforming figureshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-64/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-64/Lesson 65: Problems of computation: areas (1)https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-65/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-65/Lesson 66: Problems of computation: areas (2)https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-66/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-66/Lesson 67: Regular polygons and their circleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-67/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-67/Lesson 68: Similar regular polygons, and the apothem as a limithttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-68/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-68/Lesson 69: The circumference as a limit, and πhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-69/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-69/Lesson 7: Lines drawn to a line: which is longer?https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-7/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-7/Lesson 70: Area of a regular polygon and of a circlehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-70/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-70/Lesson 71: Inscribing the square, hexagon, decagon and pentedecagonhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-71/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-71/Lesson 72: Similar inscribed polygons, doubling the sides, and computing πhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-72/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-72/Lesson 73: Maxima and minima: triangles and polygonshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-73/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-73/Lesson 74: The regular polygon is the greatesthttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-74/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-74/Lesson 75: Theorems on regular polygons and circleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-75/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-75/Lesson 76: Constructions with circles and regular polygonshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-76/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-76/Lesson 77: Computing with circles and regular polygonshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-77/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-77/Lesson 78: Miscellaneous theoremshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-78/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-78/Lesson 79: Miscellaneous loci and problemshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-79/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-79/Lesson 8: Parallel lines and the transversalhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-8/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-8/Lesson 80: Planes, and what determines a planehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-80/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-80/Lesson 81: A line perpendicular to a planehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-81/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-81/Lesson 82: Oblique lines, loci in space, and parallel perpendicularshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-82/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-82/Lesson 83: Lines parallel to planes; planes perpendicular to one linehttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-83/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-83/Lesson 84: Parallel planeshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-84/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-84/Lesson 85: Angles with parallel sides; lines cut by parallel planeshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-85/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-85/Lesson 86: Dihedral angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-86/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-86/Lesson 87: Measuring dihedral angles; perpendicular planeshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-87/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-87/Lesson 88: Planes perpendicular to a third plane; bisecting planeshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-88/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-88/Lesson 89: Projections, the angle of a line with a plane, and the common perpendicularhttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-89/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-89/Lesson 9: More angle pairs of parallelshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-9/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-9/Lesson 90: Polyhedral angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-90/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-90/Lesson 91: Face angles of a polyhedral angle; equal trihedral angleshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-91/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-91/Lesson 92: Exercises on lines and planeshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-92/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-92/Lesson 93: Polyhedrons, prisms and parallelopipedshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-93/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-93/Lesson 94: Sections of a prism, lateral area, and equal prismshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-94/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-94/Lesson 95: Oblique prisms and parallelopipedshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-95/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-95/Lesson 96: Comparing rectangular parallelopipedshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-96/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-96/Lesson 97: Volumes of parallelopipeds and prismshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-97/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-97/Lesson 98: Problems of computation: prismshttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-98/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-98/Lesson 99: Pyramids and their lateral areahttps://teddyrookbook.com/homeschool/geometry/wentworth/lesson-99/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/geometry/wentworth/lesson-99/