2. Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal. 2. Prove that if chords of congruent circles subtend equal angles at their centres then the chords are equal. October 15, 2020 Category: Chapter 10 - Circles , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related