+0  
 
+6
497
3
avatar+379 

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
avatar
0

 I think its 40 I dunno

 Feb 24, 2021
 #2
avatar+592 
+1

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
avatar+379 
+3

Thanks!

calvinbun  Feb 27, 2021

1 Online Users