alleryAngles on a straight line form a linear pair. If one is 70 degrees, the other is what?
A110 degrees
B70 degrees
C20 degrees
D290 degrees
Answer & Solution
Correct answer: A. 110 degrees
1. A linear pair lies along a straight line, so the two angles add up to 180 degrees.
2. Other angle = 180 - 70.
3. So the other angle is 110 degrees. The value 20 comes from using 90 by mistake.
_Source: Wikipedia, Angle (CC BY-SA 4.0), Combining angle pairs_
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