Answer:
Linear Pair, Because Adjacent Angles, Supplementary Angles, etc. Don't have any common factors in help to know which is the other one.
Explanation:
- "Two adjacent angles have non-common sides that form a straight line. if one angle is acute, what kind of angle is the other one, how do you know?"
what kind of angle is the other one - Not really a(n) angle due to it being Linear Pair.
Linear Pair is Two Adjacent Angles that form a straight line.
No angle is able to do that except Linear Pair.
how do you know - By telling and seeing the main key points between angles and pairs. Pairs, as Linear Pair is "Angles" that form a straight line, in conclusion it basically means Linear Pair is angles into a line.
I hope this helps.
Peace.