# The Pythagorean Theorem

Henri Picciotto

Links to activities you can use to preview, introduce, or review the Pythagorean theorem.

On the geoboard or dot paper:
Geometry Labs, 8.4 to 9.4 — a whole unit: an exploration of the areas of tilted squares leads to the Pythagorean theorem and to a better understanding of radicals.
A philosophical discussion of the above.
On grid paper — breaking down a proof into images, step by step.
Online:
Puzzle — arrange the pieces to show a^2+b^2, then rearrange to show c^2.
Animation 1
Animation 2
Animation 3

For maximum impact, only show the animations after having done some of the preceding work.