In triangle DEF DE equals 5 and measure of angle D is 55 degree's find Fe to the nearest tenth?

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asked Mar 28, 2015 7.3k views

1 vote

In triangle DEF DE equals 5 and measure of angle D is 55 degree's find Fe to the nearest tenth?

In triangle DEF DE equals 5 and measure of angle D is 55 degree's find Fe to the nearest-example-1

Mathematics
high-school

Shanita asked

by Shanita

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5 votes

Answer:

7.1

Explanation:

DUzun answered Mar 31, 2015

by DUzun

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4 votes

$|DE|=5\\|\angle EDF|=55^o\\|FE|=?\\\\tan|\angle EDF|=(|FE|)/(|DE|)\\\\tan55^o\approx1.4281\\\\therefore:\\(|FE|)/(5)\approx1.4281\Rightarrow|FE|\approx1.4281*5=7.1405\approx7.1$

Daniel Broekman answered Apr 2, 2015

by Daniel Broekman

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