Answer:
A: alternate; same-side; corresponding
B: (5, 6), (1, 7), (8, 2), (5, 2)
Explanation:
Part A
These are a matter of definition. It is usually a good idea to acquaint yourself with the vocabulary of math and geometry, so you can understand the relationships and what the questions are.
∠1 and ∠8 -- alternate exterior angles
∠3 and ∠5 -- same-side interior angles
∠4 and ∠8 -- corresponding angles
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Part B
Angle pairs that are both acute or both obtuse are not supplementary. A supplementary pair will consist of one acute and one obtuse angle.
∠5 and ∠6
∠1 and ∠7
∠8 and ∠2
∠5 and ∠2