How are rectangles and parallelograms different?
a. rectangles have four right angles; parallelograms have two sets of congruent angles.
b. parallelograms have four congruent sides; rectangles have four sides that are not congruent.
c. parallelograms have four right angles; rectangles have two sets of congruent angles. rectangles
d. rectangles have four congruent sides; parallelograms have four sides that are not congruent.