418 B
418 B
The Law of Cosines is useful when solving for SAS or SSS triangles.
a^2 = b^2 + c^2 -2bc\cos(\alpha)
b^2 = a^2 + c^2 -2ac\cos(\beta)
c^2 = a^2 + b^2 -2ab\cos(\gamma)
- When using the Law of Cosines to solve for SSS triangles, start solving for the largest angle.
- When correctly solved, the smallest angle will be opposite the smallest side, and the largest angle will be opposite the largest side.