### Home > GC > Chapter 9 > Lesson 9.2.2 > Problem9-71

9-71.

Given the information in the diagram at right, prove that $∠C ≅ ∠D$. Write your proof using any format studied so far.

 Step 1:Proof # 1 Step 2:Proof # 2 Step 3:Proof # 3 Step 4:Proof # 4 Step 5:Proof # 5