Question

Find EF in the trapazoid

Answer 1

EF = 45

Explanation:

Area if Trapezium =
`(a + b)/(2) h`

Median =
`(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