ABCD is a trapezium in which AB || DC. M and N are the mid-points of AD and BC respectively. If AB = 12 cm, MN = 14 cm, then CD =
ABCD is a trapezium in which AB||DC,AB=16 cm and DC=24 cm.If E and Fa re respectively the midpoints of Ad andf BC,prove that ar(ABFE)=911ar(EFCD).