Question

which statement is sometimes but not always true of a rhombus?
a. exactly one pair of opposite sides are parallel.
b. all four angles are 90°.
c. opposite angles are equal.
d. all four sides are of equal length.

Explanation:

A rhombus has all four sides equal in length and opposite angles are equal. Also, both pairs of opposite sides are parallel. A square is a special - case of a rhombus where all four angles are 90°. But a general rhombus does not always have all four angles equal to 90°.

Answer:

B. All four angles are 90°.