4. In Fig 6.17, if PQRS is a parallelogram and AB II PS, then prove that OC II SR. 4. In Fig 6.17 if PQRS is a parallelogram and AB II PS then prove that OC II SR. July 5, 2021 Category: Chapter 6 - Triangles , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related