alleryIn a parallelogram, how do the opposite angles compare?
AThey differ by 90
BThey add up to 90
CThey sum to 180 only
DThey are equal
Answer & Solution
Correct answer: D. They are equal
1. One equivalent condition for a parallelogram is that opposite angles are equal.
2. So each pair of opposite angles has the same measure.
3. The other statements do not hold in general.
_Source: Wikipedia, Quadrilateral, section Convex quadrilateral_
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