In figure, ABCD is a quadrilateral and BE || AC and also BE meets DC produced at E.
Show that area of ΔADE is equal to the area of the quadrilateral ABCD
ABCD is a quadrilateral such that AB = CD, diagonals AC and BD intersect at O such that OA = OC. AL and CM are perpendiculars drawn from A and C on BD. Show that ar(ΔOAB) = ar(ΔOCD)