Interior and Exterior Angles

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Exterior Angles- An angle formed by one side of a triangle and the extension of another side

Exterior Angle Sum Theorem- If a polygon is convex, then the sum of the measures of the exterior angles, one at each vertex, is 360.


Interior Angle Sum Theorem- If a convex polygon has n and has S is the sum of the measures of its interior angles, then S = 180(n - 2).

Interior Angles- Angle inside two adjacent sides of a polygon.

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