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Polygon Interior and Exterior Angles Theorems and Examples

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  1. Do Now

  2. Section 8.2 Angles in Polygons

  3. The sum of the measures of the interior angles of a convex polygon with n sides is (n – 2) · 180˚. Polygon Interior Angles Theorem Example: Find the sum of the measures of the interior angles of the polygon.

  4. Practice: Find the sum of the measures of the interior angles.

  5. Finding interior angle measures.

  6. Practice: Find the measure of A.

  7. Polygon Exterior Angles Theorem The sum of the measures of the exterior angles of a convex polygon, one angle at each vertex, is 360˚. Example: Find the value of x.

  8. Practice: Find the value of x.

  9. Homework • P421, #8-24 even

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