What is the formula for finding the area of a parallelogram of base b and height h?

$ABCD$ is a parallelogram where $AB=8 \mathrm{cm}, AD=4 \mathrm{cm}$ and $\angle B=120°$. What is the area of $ABCD$?

If the area of the above parallelogram is 135 $ c{m}^{2}$, its altitude is _____cm.

The area of the above parallelogram is _____$ {m}^{2}$.

The area of the above parallelogram is _____$ f{t}^{2}$.

If $\mathrm{AB}=35 \mathrm{cm}, \mathrm{AD}=20 \mathrm{cm}$ and area of the parallelogram is $560 {\mathrm{cm}}^2$, find $\mathrm{LB}$.

If the area of parallelogram ABCD is 117 $ c{m}^{2}$, what is the length of the base of the parallelogram?

Maya has bought a wooden board in the shape of a parallelogram. It has a base of 15 cm and height between the parallel sides as 6 cm. She wants to cover the entire top surface of the board with satin cloth. What is the area of cloth required?

What happens to the area of a parallelogram, if the base is doubled and the height is halved?

Sudha has a puzzle that is in the shape of a parallelogram. Its length is 35 cm and its perpendicular height is 20 cm. What is the area occupied by the puzzle?

Do the parallelogram and rectangle shown in the figure below have the same area?