Find the area of the shaded region in fig.12.20, if radii of the two concentric circles with centre O are 7 cm and 14 cm respectively and ∠AOC=40 degree. Find the area of the shaded region in fig.12.20 if radii of the two concentric circles with centre O are 7 cm and 14 cm respectively and ∠AOC=40 degree. October 6, 2020 Category: Chapter 12 - Areas Related to Circles , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related