Question

Give reasons for the following.
A rectangle can be thought of as a special parallelogram.

Answer 1

Opposite sides of a parallelogram are parallel and equal. In a rectangle, the opposite sides are parallel and equal. Also, all the interior angles of the rectangle are of the same measure, i.e., $\left({90}^o\right)$. In other words, a parallelogram with each angle a right angle becomes a rectangle. Therefore, a rectangle can be thought of as a special parallelogram.