13. Prove that the quadrilateral formed by the bisectors of the angles of a parallelogram is a rectangle. 13. Prove that the quadrilateral formed by the bisectors of the angles of a parallelogram is a rectangle. July 1, 2021 Category: Chapter 8 - Quadrilaterals , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related