12. In a quadrilateral ABCD, ∠A + ∠D = 90°. Prove that AC^2 + BD^2 = AD^2 + BC^2 ∠A + ∠D = 90°. Prove that AC^2 + BD^2 = AD^2 + BC^2 12. In a quadrilateral ABCD July 5, 2021 Category: Chapter 6 - Triangles , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related
