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8.2-Law of the Cosines

8.2-Law of the Cosines. 1. Law of the Cosines & Requirements. 2. Area of Triangles. 3. Practice Problems. Law of the Cosines. Law of the Cos ines. Requirements Two sides and an angle between them SAS Three sides SSS

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8.2-Law of the Cosines

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  1. 8.2-Law of the Cosines 1 Law of the Cosines & Requirements 2 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

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