alleryOne corner of a concave quadrilateral measures what?
ABelow 90°
BExactly 90°
CExactly 180°
DAbove 180°
Answer & Solution
Correct answer: D. Above 180°
1. Concave means one corner points inward.
2. That interior angle is bigger than 180°.
3. One diagonal then lies outside the quadrilateral.
_Source: Wikipedia, Quadrilateral, Concave quadrilaterals_
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