By vector method, prove that if the diagonals of a parallelogram intersect perpendicularly,then the parallelogram is rombus. By vector method prove that if the diagonals of a parallelogram intersect perpendicularly then the parallelogram is rombus. August 27, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related