Use the Law of Cosines:

For ∠A:

142

^{2}= 211^{2}+ 185^{2}- 2(211)(185) cos AMark M.

tutor

The Law of Cosines could be used in the same manner for the other two angles.

After you get one angle, say A, you can use the Law Sines to determine the other two angles. Your choice.

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06/01/16

Youssef H.

06/01/16