alleryA quadrilateral has angles of 90, 80 and 100 degrees. The remaining angle is what?
A110 degrees
B100 degrees
C90 degrees
D70 degrees
Answer & Solution
Correct answer: C. 90 degrees
1. The four angles of a quadrilateral add up to 360 degrees.
2. 90 + 80 + 100 = 270 degrees.
3. Remaining angle = 360 - 270 = 90 degrees.
_Source: Wikipedia, Quadrilateral (CC BY-SA 4.0), Quadrilateral_
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