Question

22. A parallelogram in which one angle 90° is necessarily:

A. Square
B. rhombus C. rectangle
D.trapezium​

Answer 1

C. Rectangle

Explanation:

A parallelogram can not have a single 90° angle. This is because the opposite angles of a parallelogram are equal.

Therefore, the two opposite sides are equal.

In a parallelogram, neighboring angles add up to 180°. This therefore implies that all the angles are 90°.

This describes a rectangle.