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Let \(a\) and \(b\) be positive lengths, and consider the following triangles:

Then what are 
\(\angle A, \angle D, \angle G\)

in radians, in that order?

 
 Jul 19, 2021
 #1
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By the Cosines Law, angle A = 2*pi/3, ange D = pi/2, angle G = pi/3.

 
 Jul 19, 2021
 #2
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Use Law of Cosines for all three problems and you should get the answer pretty quickly.

 

\(\angle A = \frac{5\pi}{6}\)

\(\angle D = \frac{\pi}{2}\)

\(\angle G = \frac{\pi}{4}\)

 
 Jul 19, 2021

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