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UADRILATERALS 15st, , , , s, , In a parallelogram ABCD, E and F are the d,, mid-poins of sides AB and CD respectively \7, (see Fig. 831). Show thatthe line segments AF, , and EC trisect the diagonal BD., , , , ~ B, Fig. 831, , ‘Show that the line segments joining the mid-points of the opposite sides of a, , quadrilateral bisect each other., , ABCis atriangle right angled at C.A line through the mid-point M of hypotenuse AB, , and parallel to BC intersects AC at D. Show that, , @ isthe mid-point of AC @ MDLAC