Answer:
a. Given
b. Given
c. Linear Pair Postulate
d. Same side interior angle theorem
e. Converse of same side interior angle theorem
Explanation:
Linear Pair Postulate – says that “If two angles form a linear pair, then those angles are also going to be supplementary.”
Same side interior angle theorem – says that “If two lines are parallel and same side interior angles are formed, then the angles will be supplementary to one another.”
Converse of same side interior angle theorem – says that “If same side interior angles are supplementary, then the lines that form them will be parallel to one another.”