* both pairs of opposite sides are parallel * both pairs of opposite sides are congruent * both pairs of opposite angles are congruent * one pair of opposite sides are parallel and congruent * both diagonals bisect each other * all consecutive angle pairs are supplementary
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a quadrilateral has 4 sides.
No, it is not. A quadrilateral is a 4-sided polygon. A triangle is a 3-sided polygon. Therefore, whatever way you turn it, a triangle will never be a quadrilateral.
If its 4 sides are of different lengths then it will have no congruent angles
The term is quadrilateral.
quadrilateral