alleryHow many degrees must be added to 110° to reach a straight angle?
A20°
B80°
C70°
D250°
Answer & Solution
Correct answer: C. 70°
1. The supplement is the difference between the angle and a straight angle.
2. 180° - 110° = 70°.
3. 250° would be the explement (360° - 110°), and 20° is the complement-style error (130° is not involved).
_Source: Wikipedia, Angle, Combining angle pairs_
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