Answer :
9514 1404 393
Answer:
3. rhombus
Step-by-step explanation:
If the diagonals are perpendicular, adjacent sides are congruent. If adjacent sides of a parallelogram are congruent, it is a rhombus.
__
Diagonals are congruent in a rectangle or square, so those choices don't apply. In a general parallelogram, the diagonals may not be perpendicular.