CCSS IP Math II 5.7.1 Example 2
Use the parallelogram from Example 1 to verify that the opposite angles in a parallelogram are congruent and consecutive angles are supplementary given that and .
- Extend the lines in the parallelogram to show two pairs of intersecting lines and label the angles with numbers.
- Prove .
- Prove .
- Prove that consecutive angles of a parallelogram are supplementary.