Question

pls solve this question (12)

Answer 1

I hope it's help u dear

Answer 2

Since, BC║AE, AC is transversal.

∠EAC = ∠ACB                            (Alt. Interior angles)-(1)

∠EAC = ∠DAE                            (Given)

∠DAC = ∠ABC+∠ACB

∠EAC+∠DAE = ∠ABC+∠ACB

∠EAC+∠EAC = ∠ABC+∠EAC

∠EAC = ∠ABC                         -(2)

From(1) and (2),

∠ABC = ∠ACB

⇒AC = AB                                  (Sides opposite to equal angles are equal)

Hence, proved.