In an equilateral triangle ABC,D is a point on side BC such that BD = 3/1 BC. Prove that 9 AD^2 = 7AB^2. D is a point on side BC such that BD = 3/1 BC. Prove that 9 AD^2 = 7AB^2. In an equilateral triangle ABC October 5, 2020 Category: Chapter 6 - Triangles [...]
