Hello Bharat
In Theorem 6.2, we have to prove DE parallel BC. It is not given
Please check the video here https://www.teachoo.com/question/20386/In-theorm-6.2-it-is-given-that-DE-parallel-to-BC-then-why-we-contradic/
Written on Sept. 2, 2018, 1:32 p.m.