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# Trig Question

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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