Here's how to arrange the proof to show that opposite angles ∠6 and ∠11 are congruent in the parallelogram:
| Statement | Reason | |------------------------------------------------|----------------------------------| | 1. a∥b and e∥f | given | | 2. m∠5 + m∠6 = 180° and m∠9 + m∠11 = 180° | definition of linear pair | | 3. m∠13 + m∠6 = 180° and m∠13 + m∠11 = 180° | corresponding angles theorem | | 4. m∠6 = m∠11 | transitive property of equality |
So, the responses you should fill in are as follows:
- Response area 2: Corresponding Angles Theorem
- Response area 4: Transitive Property of Equality
- Response area 6: m∠6 = m∠11
This completes the proof showing that ∠6 and ∠11 are congruent.