Question

Find EF in the trapazoid

Answer 1

EF = 45

Step-by-step explanation:

Area if Trapezium = $\frac{a + b}{2} h$

Median = $\frac{1}{2} (a + b)$

Median = 5x

5x = 1/2 ((x + 3) + 78)

5x = (x + 81) / 2

10x = x + 81

9x = 81

x = 9

EF = 5x

EF = 5(9)

EF = 45