8.2-Law of the Cosines

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1Law of the Cosines & Requirements

Area of Triangles

Practice Problems

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Law of the Cosines

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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

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SAS Example

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SAS Example (Cont.)

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SSS Example

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SSS Example (Cont.)

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Area of a Triangle

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Area of a Triangle Example

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Heron’s Formula

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Heron’s Formula Example

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Practice Problems Page 587

Problems 5-14, 16-18, 22