4. In Fig. 6.16, if x+y = w+z, then prove that AOB is a line. 4. In Fig. 6.16 if x+y = w+z then prove that AOB is a line. October 15, 2020 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related