3. ABCD is a rhombus such that ∠ACB = 40^o. Then ∠ADB is 3. ABCD is a rhombus such that ∠ACB = 40^o. Then ∠ADB is June 30, 2021 Category: Chapter 8 - Quadrilaterals , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related