The adjacent sides of a parallelogram $PQRS$ are $12 cm \& 6 cm$ as shown in the given figure. The height corresponding to the side $QR$ is $8 cm$.  Find the altitude corresponding to the base $PQ$.

The adjacent sides of a parallelogram are in the ratio $5:3$. If the longer of the two sides is $7.5 cm$, find the perimeter of the parallelogram.

In $△ABC, AB=12 cm, BC=9 cm \& AD=6 cm$. Find the area of $△ABC$.

In $△ABC, AB=12 cm, BC=9 cm \& AD=6 cm$. Find the altitude of $CE$.

The area of a triangle is equal to the area of a square whose each side measures $10 m$. Find the length of the side of a triangle corresponding to the altitude measuring $5m$.

$PQRS$ is a rectangle with dimensions $28 \mathrm{m}$ by $20 \mathrm{m}$. $POQ$ is a triangle such that $O$ is the point of intersection of the diagonals. Find the area of the shaded region.

Calculate the missing measurements in the following table:

$\begin{array}{|ccccc|}\hline \mathrm{S}. \mathrm{No}.& \mathrm{Figure}& \mathrm{Base}& \mathrm{Height}& \mathrm{Area}\\ 1.& \mathrm{Triangle}& \mathrm{\_\_\_\_\_cm}& 18 \mathrm{cm}& 306 {\mathrm{cm}}^2\\ 2.& \mathrm{Parallelogram}& \mathrm{\_\_\_\_\_} \mathrm{m}& 4.9 \mathrm{m}& 25.48 {\mathrm{m}}^2\\ 3.& \mathrm{Parallelogram}& 250 \mathrm{m}& \mathrm{\_\_\_\_\_} \mathrm{m}& 2 \mathrm{hectare}\\ \hline\end{array}$