The area of a parallelogram can be found by taking its base (b) and multiplying by the height (h). The base has the measure of 33 +12 = 45 cm. Now, you just need to find the height of the parallelogram. The height can be found by using the pythagorean theorem (.
So, when simplified the height of the parallelogram will be found from
The height is 20 cm. The base is 45 cm. 45 x 20 = 900.