Question

A right-angled triangle at B, AB=DB, D belongs to AC. Prove that: 2(BD)^2=AD.AC

Answer 1

D belongs to AC ..

Answer 2

Yes, the drawing is right now. Then I want to prove what required.

Answer 3

AC^2 = AB^2 + BC^2

Answer 4

Aha, I got that, then.. ?

Answer 5

Now let's try to prove the triangles ABC and BDA similar...
You know similarity in triangles?

Answer 6

Yes, I know the similarity.