Answer:




Step-by-step explanation:
1.
Angles 7 and 5 are corresponding, then

Angles 7 and 2 are supplementary, then

Angles 1 and 7 are vertical, so

Angles 2 and 8 are vertical, so

Angles 2 and 4 are corresponding, then

Angles 1 and 3 are corresponding, then

Angles 8 and 6 are corresponding, then

Thus,


2.
Angles 16 and 14 are corresponding, then

Angles 16 and 15 are supplementary, then

Angles 16 and 10 are vertical, so

Angles 9 and 15 are vertical, so

Angles 15 and 13 are corresponding, then

Angles 10 and 12 are corresponding, then

Angles 9 and 11 are corresponding, then

Thus,

