A parallelogram with base b and height h.   21 2 = ( 3 4 ) (h) ( 4 3 ) ( 21 2 ) = ( 4 3 ) ( 3 4 ) (h) The area of a parallelogram can be found by the equation area = (b)(h) Find the height of a parallelogram that has an area of 10 1 2 in² and a base of 3 4 in. The height of the parallelogram is inches.