alleryTwo angles side by side on a straight line (a linear pair) add up to what?
A180°
B90°
C360°
D270°
Answer & Solution
Correct answer: A. 180°
1. A linear pair is two adjacent angles whose outer sides form a straight line.
2. Together they make a straight angle, 180°.
3. 90° is the sum for complementary angles and 360° a full turn.
_Source: Wikipedia, Angle, Combining angle pairs_
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