Pythagoras TheoremTheorem 1: In a right angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. Given: A right-angled triangle ABC in which B = ∠90º. To Prove: (Hypotenuse)2 = (Base)2 + (Perpendicular)2. i.e., AC2 = AB2 + BC2 Construction: From B draw BD ⊥ AC.Proof: In triangle ADB and ABC, we have ∠ADB = ∠ABC … [Read more...] about Pythagoras Theorem