A triangle has 3 sides and 3 corners. A rectangle has 4 sides: two long and two short. A triangle can point any way!
Key idea
A triangle has 3 sides. A rectangle has 4 sides, two long and two short.
For the grown-up: Make triangles and rectangles with sticks, straws or your fingers. Cut a sandwich into triangles or rectangles and name the shapes before eating. A few problems on the screen is plenty. The real practice is with things you can touch.
- Try it at home: Cut toast into triangles.
- Find rectangles: doors, books, phones.
- Make shapes with string on the floor.