Chapter 4 – Solving Triangles

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Topic 4.2

Solving Triangles Using the Law of Cosines

*Solving Triangles Using the Law of Cosines* solves triangles in the Side-Angle-Side (SAS) and Side-Side-Side (SSS) cases. It refers to the *Law of Sines* to complete the solving process, so familiarity with *Solving Triangles Using the Law of Sines – Part I* is helpful, but not necessary. Each problem could be solved using only the Law of Cosines. The remaining case, the ambiguous Side-Side-Angle (SSA) case is shown in *Solving Triangles Using the Law of Sines – Part II*.

The proof of the *Law of Cosines* is not given here, only examples where the *Law of Cosines* is used to solve triangles.

Transcript

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