11.Find the area of the equilateral ABCD. Here, AC = 22 cm, BM = 3 cm, DN = 3 cm and BM ⊥ AC, DN ⊥ AC. 11.Find the area of the equilateral ABCD. Here AC = 22 cm BM = 3 cm DN = 3 cm and BM ⊥ AC DN ⊥ AC. October 9, 2020 Category: Chapter 11 - Perimeter and Area , Maths , NCERT Class 7 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related