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#1**+1 **

If you know all the angles but 1, you can use the triangle sum theorem, which says that the sum of the measure of the angles of a triangles is 180 degrees.

There are 2 equations that you will need, as well. They are the law of sines and the law of cosines.

The law of sines:

\(\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\)

The law of cosines:

\(c^2=a^2+b^2-2ab\cos C\)

You can solve any triangle knowing these 3 formulas.

TheXSquaredFactor Aug 28, 2017

#1**+1 **

Best Answer

If you know all the angles but 1, you can use the triangle sum theorem, which says that the sum of the measure of the angles of a triangles is 180 degrees.

There are 2 equations that you will need, as well. They are the law of sines and the law of cosines.

The law of sines:

\(\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\)

The law of cosines:

\(c^2=a^2+b^2-2ab\cos C\)

You can solve any triangle knowing these 3 formulas.

TheXSquaredFactor Aug 28, 2017