X 90 degrees. You can see that this is true by rearranging the parallelogram to make a rectangle. Let a 3 cm and b4 cm.
Multiply the base of the parallelogram by the height to find the area.
How to Calculate the Area of a Parallelogram. Area b h. To get the area you would need to find the missing sides. The height is the length that a perpendicular line must travel from the.