Pythagoras Theorem Proof

Pythagoras Theorem states that in a right-angle triangle, sum of squares of (small) sides equals to the square of the hypotenuse (long side).

The model has 3 squares on each side of the triangle. The pieces in the small squares should fit exactly in the big square if Pythagoras Theorem is true.

This is a simple model for teaching middle school students to better understand math and Pythagoras Theorem.