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# Help. ASAP. Thank you very much.

+4
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In right triangle $$DEF$$, we have $$\angle D = 25^\circ$$$$\angle E = 90^\circ$$, and $$EF = 9$$. Find $$DE$$ to the nearest tenth. You may use a calculator for this problem.

Feb 24, 2021

#1
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I think its 40 I dunno

Feb 24, 2021
#2
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Let x = side DE

$$Tan(25) = \frac{9}{x}$$

$$\frac{9}{x} ≈ 0.466$$

$$x ≈ \frac{9}{0.466}$$

$$x ≈ 19.3$$

Feb 26, 2021
#3
+294
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Thanks!

calvinbun  Feb 27, 2021