Question

select the correct answer.
what is a counterexample to this claim?
all quadrilaterals are parallelograms.
a. a rectangle
b. a rhombus
c. a square
d. a trapezoid

Explanation:

A counterexample disproves the claim that all quadrilaterals are parallelograms. Parallelograms require two pairs of parallel sides. A trapezoid only has one pair of parallel sides, so it is a quadrilateral that is not a parallelogram. Rectangles, rhombuses, and squares are all types of parallelograms.

Answer:

D. a trapezoid