Asit Das Gupta and Alok Kumar Solutions for Exercise 1: EXERCISE 5

The point $Q$ and $U$ lie in the interior of the quadrilateral.

The points $R$ and $T$ do not lie on the quadrilateral.

The point $S$ lies in exterior of the quadrilateral.

Each pair of the opposite sides of a parallelogram is parallel.

The opposite sides of a parallelogram may not be equal.

The diagonals of a parallelogram are equal. 

The adjacent sides of a rectangle are always equal.

If two adjacent sides of a parallelogram are $12 \mathrm{cm}$ and $8 \mathrm{cm}$, find its perimeter in $\mathrm{cm}$.