find the area of trapezium whose parallel sides are 12 cm and 16 cm long , and the distance between them is 14 cm ?
"area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 12 + 16 ) * ( 14 ) = 196 cm 2 answer : d"
quadrilateral_area(14, 16, 12)