Andy C. answered • 08/23/17

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Math/Physics Tutor

OPTION #1

You can use the law of cosines to find one of the angles.

Then use the law of sines to find a second angle.

Finally using the law of sines to find the third angle.

OPTION #2

You can use strictly the law of sines to get three equations

with three unknown angles. Much more challenging.

Option #3

You can drop a height from one of the vertices

and use the pythagorean theorem and trig.

Most challenging.