i am a meritnation paid user

in equilateral trangle d is a pnt on bc side bd=1third bc prove that 9ad2 =7ab2

Question

i am a meritnation paid user
in equilateral trangle d is a pnt on bc side bd=1third bc prove
that 9ad2 =7ab2

Lalit Mehra · Accepted Answer

Dear Student!

Given: Î”ABC is an equilateral triangle D is point on BC such that BD = $\frac{1}{3}$ BC To prove: 9 AD2 = 7 AB2 Construction: Draw AE âŠ¥ BC

$\Rightarrow 9 A D^{2} = 7 A B^{2}$ Cheers!