Question

Which of these descriptions would NOT guarantee that the figure is a parallelogram?

A) A quadrilateral with consecutive angles supplementary.
B) A quadrilateral with diagonals bisecting each other.
C) A quadrilateral with both pairs of opposite sides congruent.
D) A quadrilateral with one pair of opposite sides parallel

Answer 1

D) A quadrilateral with one pair of opposite sides parallel

Explanation:

Choice D matches the description of a trapezoid, not a parallelogram. That description will not guarantee the figure is a parallelogram.