7.2: The Law of Cosines

Objectives:

• Use the Law of Cosines to solve oblique triangles (SSS or SAS).

• Use the Law of Cosines to model and solve real-life problems.

Examples:

Example 1. The Law of Cosines (SSS)


Example 2. The Law of Cosines (SAS)



Student example 1




Example 3. Using Heron's area formula to find the area of a triangle


Student Example




7.2 Problem Set
#2-10 even, 25-28, 31, 39,