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Mathematics 18 Online
OpenStudy (dj3strella):

Help me please

OpenStudy (dj3strella):

@BunnyBree

OpenStudy (perl):

EF is the 'median' of the trapezoid

OpenStudy (perl):

it hits the midpoints of the two sides

OpenStudy (perl):

so we can use a median theorem for trapezoid

OpenStudy (perl):

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

OpenStudy (perl):

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

OpenStudy (perl):

EF = 1/2( 7 + 13)

OpenStudy (perl):

@BunnyBree what formula are you using there

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