Tangram Proves the Pythagorean Theorem Pythagorean Theorem in a Right Triangle Two The sum of the squares of the sides of a right angle is equal to square of hypotenuse The Pythagorean theorem is in elementary geometry a fundamental theorem this theorem Known as Pythagoras in Western countries Sri Lanka's theorem Here is the ancient jigsaw puzzle Proving the same old Pythagorean theorem by lstar Title: Proving the Pythagorean Theorem using jigsaw puzzles Sending station: BBS Shuimu Tsinghua Station Wed Jul 3 01:17:14 2002