Question

for each of the following quadrilaterals, select all the properties that must be true.

	two pairs of parallel sides	only one pair of parallel sides	all sides congruent	four right angles
(b) trapezoid	□	□	□	□
(c) rectangle	□	□	□	□

Explanation:

• A parallelogram has two pairs of parallel sides by definition. It does not have only one pair of parallel sides, all - sides congruent or four right - angles necessarily.
• A trapezoid has only one pair of parallel sides by definition. It does not have two pairs of parallel sides, all - sides congruent or four right - angles necessarily.
• A rectangle has two pairs of parallel sides and four right - angles. It does not have only one pair of parallel sides or all - sides congruent necessarily.

Answer:

(a) Two pairs of parallel sides
(b) Only one pair of parallel sides
(c) Two pairs of parallel sides, Four right angles