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In ΔABC, given that AB = 9 m, AC = 12 m, and BC = 15 m. Find the measure of∠B.

Guest Oct 1, 2017
 #1
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This forms a right triangle....

 

tan B  = AC /AB = 12/9 =   4/3

 

So

 

arctan (4/3)  = B ≈  53.13°

 

cool cool cool 

CPhill  Oct 1, 2017
edited by CPhill  Oct 1, 2017

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