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I know that the answer is D. 17.5 I just need help on knowing the steps to solve this question. Help is greatly appreciated!

I know that the answer is D 175 I just need help on knowing the steps to solve this question Help is greatly appreciated class=

Respuesta :

cdw2014
If BCEF is a square, that means all the sides are equal. If AD = 7, FB has to also be 7.

A_F = AB - FB = 12 - 7 = 5

The area of a triangle is .5bh, and we know the base is 5 and the height is 7.

0.5 * 5 * 7 = 17.5

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