ABCD is a quadrilateral in which AB|| DC, and E and F are the mid points of the diagonals AC and BD, respectively. If AB = 12 cm, BC = 40 cm, DC = 30 cm, and AD = 45 cm, then what is the length ( in cm) of EF?
ABCD is a quadrilateral in which AB|| DC, and E and F are the mid points of the diagonals AC […]