Answer:
11. EF = 27
Explanation:
11.
Median of a trapezoid:
2x - 13 = 20 + x + 14
2
2(2x - 13) = 20 + x + 14
4x - 26 = 34 + x
4x - x = 34 + 26
3x = 60
x = 20
EF = 2x - 13
EF = 2(20) - 13
EF = 40 - 13
EF = 27
(x + 34)/2 = 2x - 13
x+ 34 = 4x - 26
EF = 2(20) -13 = 27
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