Which figure is not a parallelogram?

Hello, User!

In Euclidean geometry, a parallelogram is a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.

to identify a parallelogram you... it need to have...

Opposite sides are parallel by definition.

Opposite sides are congruent.

Opposite angles are congruent.

Consecutive angles are supplementary.

The diagonals bisect each other.

so therefore the second option would not be correct! if not sure what  i mean by second choice i included a screenshot of which one is not a parallelogram!

Hope this helps and i was super glad to help hope you have a fantastic day!

kind regards,

-Philaeagles14

1 and 2

step-by-step explanation:

2x^2+5x+17

your welcome. : )