Question

If CD ≅ EC, which angles are congruent?

∠6 ≅ ∠7 , ∠5 ≅ ∠6 ,
∠5 ≅ ∠7 , ∠4 ≅ ∠8

Answer 1

since those two sides are equal, their base angles also wil be equal (theorem :- base angles of isosceles triangle are congruent)