which condition is Not sufficient to prove that quadrilateral in a parallelogram
a. a pair of opposite side are congruent and parallel
b. both pairs of opposite angles are congruent
c. the diagonals are perpendicular
d. both pairs of opposite side are congruent
a. a pair of opposite side are congruent and parallel
b. both pairs of opposite angles are congruent
c. the diagonals are perpendicular
d. both pairs of opposite side are congruent
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Answer:
C
Step-by-step explanation:
Diagonals don't meet/create at/a 90° angle. Note that the property of being perpendicular b/n two lines meet at a right angle