Prove that if in a triangle square on one side is equal to the sum of the squares on the other two sides, then the angle opposite the first side is a right angle. Prove that if in a triangle square on one side is equal to the sum of the squares on the other two sides then the angle opposite the first side is a right angle. July 5, 2021 Category: Chapter 6 - Triangles , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related