TANGRAMS

We’ve shown the same grid twice for clarity’s sake (several of the pieces overlap). Please note that some of the shapes appear more than once on the grid.

HINGED DISSECTIONS

1. In each figure below, the yellow piece swings around the red pivot point to reach the green position and form a square or triangle.

2. The top right figure requires two swings, and forms a triangle. All others require just one swing of one piece to form a square or triangle. (You could also form a square by swinging the two bottom pieces up together as a unit.)

3. In the top left figure, the swinging piece would collide with the top blue triangle, unless the triangle were first moved out of the way.