Solve any triangle — when Pythagorean theorem isn't enough
The Pythagorean theorem only works for right triangles. For any other triangle, you need 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.
In this lesson you'll see triangles drawn with segments and labels, solve for missing sides and angles, and explore the ambiguous case where two different triangles fit the same measurements.