3. Show that if the diagonals of a quadrilateral bisect each other at right angles, then it is a rhombus. 3. Show that if the diagonals of a quadrilateral bisect each other at right angles then it is a rhombus. October 15, 2020 Category: Chapter 8 - Quadrilaterals , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related