A = 900[tex] cm^{2} [/tex]
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 ([tex] a^{2} + b^{2} = c^{2} [/tex].
So, when simplified the height of the parallelogram will be found from [tex] \sqrt{ 29^{2} - 21^{2}} [/tex]
The height is 20 cm. The base is 45 cm. 45 x 20 = 900.
