# NCERT Solutions Class 10 Maths – Triangles | Chapter 6 Exercise – 6.5 Question 15

### Triangles | Chapter 6 Exercise 6.5 Question 15:

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

Solution: Detailed explanation of exercise 6.5 question 15 is given in the below image and YouTube video.

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