Question

(or)
B) In an equilateral triangle ABC,
D is a point on side BC, such that
BD = 3 BC, prove that 9 AD2 = 7 AB2.
BL​

Answer 1

Answer:

hope it will help u

Step-by-step explanation:

Note : in equilateral triangle a perpendicular is also act as angle bisected or median or altitude.