13. In Fig. 10.20,O is the centre of the circle, ∠BCO = 30°. Find x and y ∠BCO = 30°. Find x and y 13. In Fig. 10.20 O is the centre of the circle July 2, 2021 Category: Chapter 10 - Circles , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related