"Let's look closely at shapes," says Ollie. Cut out the pieces below, then put them together and take them apart to make new shapes. You'll also fold your own right-angle tester!
Cut out these pieces
Part A — Combine shapes
1. Put Triangle A and Triangle B together along their longest sides. What shape do they make?
2. Can you cover Square D using other pieces? Draw what you used.
Part B — Split shapes
3. Fold Rectangle C along its diagonal and cut. What two shapes do you get?
Part C — Make a right-angle tester
Take any square of paper. Fold it in half, then in half again. The folded corner is a perfect right angle!
4. Use your tester on three corners in the room. Find one that is a right angle, one smaller, and one larger. List them.