*use a 2 proof column to answer*

Given: Two congruent angles ∠C and ∠R are supplementary.
Prove: ∠R and ∠C are both right angles.

EX:
Statements Reasons
1. 1.
2. 2.
3. 3.
4. 4.
5. 5.
6. 6.
7. 7.
8. 8.
9. 9.
10. 10.