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**Solving Right Triangles**

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Essential Question How do I solve a right triangle?

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Vocabulary Solve a right triangle – to determine the measures of all six parts (3 angles, 3 sides).

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Inverse Trig Ratios We use the inverse sine, inverse cosine, and inverse tangent if we are trying to find angle measures. The calculator buttons look like this: sin-1 cos-1 tan-1

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Example 1 Find the acute angles of the triangle. Round to the nearest tenth.

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Try This! Find the acute angles of the triangle. Round to the nearest tenth.

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Example 2 Solve the right triangle.

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Try This! Solve the right triangle.

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Summarizer What is the minimum amount of information needed to solve a right triangle? 2 side lengths or… 1 side length and 1 acute angle measure

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Trig Ratios C 5 2 A M 4. If C = 20º, then cos C is equal to:

Trig Ratios C 5 2 A M 4. If C = 20º, then cos C is equal to:

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