the diagonal of a rhombus are 40 m and 30 m . its area is :
area of the rhombus = 1 / 2 d 1 d 2 = ( 1 / 2 ã — 40 ã — 30 ) cm ( power ) 2 = 40 ã — 15 = 600 cm ( power ) 2 answer is a .
rhombus_area(40, 30)