In quadrilateral ABDC, AB // CD. Which additional piece of information is needed to determine that ABDC is a parallelogram? over
line AB cong overline CD O overline AC cong overline BD OAB overline AB perp overline BD; overline CD perp overline BD
1 answer:
Answer:
AC is parallel to BD
Step-by-step explanation:
A parallelogram is a quadrilateral with two pairs of parallel sides.
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