Question

Help me please

Answer 1

@BunnyBree

Answer 2

EF is the 'median' of the trapezoid

Answer 3

it hits the midpoints of the two sides

Answer 4

so we can use a median theorem for trapezoid

Answer 5

"The median of a trapezoid is parallel to the bases and equal to one-half the sum of the bases."

Answer 6

this means
EF = 1/2 ( BC + AD )

Answer 7

EF = 1/2( 7 + 13)

Answer 8

@BunnyBree what formula are you using there