Answer
1. true, they have a common side and a common vertex and don't overlap.
2. true, the angles opposite each other when two lines cross.
3. false, their measures is not 90 degrees
4. true, they add up to 180 degrees.
5. they are supplementary angels and it always exact 180 degrees so 180-72=108 degrees. the answer is 108 degrees
Step-by-step explanation:
