Proof of the Pythagorean Theorem from Euclid's Elements

This applet demonstrates the classic geometric proof of the Pythagorean theorem from Euclid's Elements. By constructing squares on the sides of a right triangle and using congruent triangles, it visually shows that the sum of the areas of the squares on the legs equals the area of the square on the hypotenuse, aiding in understanding its geometric essence.