20. LM is the midsegment of trapezoid ABCD. If AB = 34 and DC = 128, what is LM? (1 point) In a trapezoid, you can find the length of the midsegment by%C2%A0 the bases together and then%C2%A0 by 2.%C2%A0 Therefore the length of LM or the midsegment in this trapezoid is

LM = 1/2 (AB + DC)

LM = 1/2 (34 + 128)
LM = 1/2 (162)
LM = 81