Question

In the adjoining figure, AB = BC and AC = CD.
Prove that: ∠BAD : ∠ADB = 3 : 1.

Answer 1

Answer:

angle cad= angle d___(isoceles triangle theorem)

angle bac=angle bca____(iso triangle theorem)

angle acb=angle cad+angle d______(remote interior angle theorem)

therefore from 1,2,3

angle bac=2angle adb

angle bac+angle cad=bad____(angle addition)

2 angle adb+angle adb=bad

3 angle adb=bad

therefore bad:adb=3:1

Answer 2

Answer:

Answer is in the pic Hope it helps you