In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3
BC. Prove that 9 AD2 = 7 AB2

Question

In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3 BC. Prove that 9 AD2 = 7 AB2​

Cora · Answer

Answer:   Check your answer please

Charlotte · Answer

Hope this helps  All the best!

In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3BC. Prove that 9 AD2 = 7 AB2​