Answer:
a. A parallelogram
Step-by-step explanation:
A trapezoid is a four-sided flat shape with a pair of parallel sides.
A parallelogram has two pairs of parallel sides.
b. can apply to a trapezoid. A polygon has three or more sides.
c. can apply to a trapezoid. A quadrilateral has four sides.
d. can apply to a trapezoid. A shape with four angles is also a quadrilateral.
