find the area of trapezium whose parallel sides are 24 cm and 14 cm long , and the distance between them is 18 cm ?
"area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 24 + 14 ) * ( 18 ) = 342 cm 2 answer : e"
quadrilateral_area(18, 14, 24)