Question

How to find the third side of a triangle with two sides and an angle?

Answer 1

Just like the Law of Sines, the Law of Cosines works for anytriangle, not just righttriangles. In particular, the Law of Cosines can be used to find the length of the third side of a triangle when you know the length of two sidesand the angle in between. To use the Law of Sines to find athird side: 1.