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D, E, and F are points on the sides of the triangle ABC...

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by AAPL » Thu Jul 30, 2020 2:55 am

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Economist GMAT
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D, E, and F are points on the sides of triangle ABC above, such that quadrilateral AEFD is a rectangle. If DC=1, and CF=4, what is the value of AD?

1) 3EB=AB
2) FB=2

OA D
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