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bezimeni [28]
3 years ago
12

In △DEF, DE = 5 and m∠F=55. Find FE.

Mathematics
2 answers:
Marizza181 [45]3 years ago
7 0
Check the picture below.

make sure your calculator is in Degree mode.

Elden [556K]3 years ago
3 0
SOH CAH TOA

tan(55°) = 5/(FE)
FE = 5/tan(55°)
FE = 3.5
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Remark

I think you are supposed to assume that this is a parallelogram. In that case the two labeled angles are intended to be equal (one of the properties of a parallelogram).

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