Question

VI. Given: angle 1 and angle 2 are supplementary

Prove: angle 3 and angle 4 are supplementary

1, Given

2. Def. of supplementary angles

3. Vertical angles are congruent

4. Def. of congruent angles

5. Substitution

6. Def. of

Answer 1

2. def. of supplementary angles

Explanation: