Question

a quadrilateral is a trapezoid. always sometimes never

Explanation:

Step1: Define quadrilateral and trapezoid

A quadrilateral is a four - sided polygon. A trapezoid is a quadrilateral with at least one pair of parallel sides.

Step2: Analyze the relationship

There are many types of quadrilaterals like squares, rectangles, parallelograms, rhombuses and trapezoids. Not all quadrilaterals have a pair of parallel sides. For example, a kite is a quadrilateral but not a trapezoid. But some quadrilaterals are trapezoids.

Answer:

Sometimes