1. 8.2-Law of the Cosines 1 2 3 Law of the Cosines & Requirements
Area of Triangles 3
Practice Problems

2. Law of the Cosines

3. Law of the Cosines Requirements Two sides and an angle between them
SAS
Three sides
SSS
If these conditions are not met, the problem cannot be solved with the Law of the Cosines

4. SAS Example

5. SAS Example (Cont.)

6. SSS Example

7. SSS Example (Cont.)

8. Area of a Triangle

9. Area of a Triangle Example

10. Heron’s Formula

11. Heron’s Formula Example

12. Practice Problems
Page 587
Problems 5-14, 16-18, 22