In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3 BC.
In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3 BC. Prove that 9AD2 = 7AB2
#cbseclass10maths
#triangles
#pythagoras_theorem
#exersice 6.5
#question 15
@studysafelyathome