3-3 & 3-4 Parallel Lines & the Triangle Angle-Sum Theorem

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Presentation transcript:

3-3 & 3-4 Parallel Lines & the Triangle Angle-Sum Theorem The Polygon Angle-Sum Theorem

OBJECTIVES Classify triangles and find the measures of their angles To use exterior angles of triangles Classify polygons and find the sums of the measures of the interior and exterior angles of polygons

VOCABULARY Exterior angle of a polygon- an angle formed by a side and an extension of an adjacent side Remote interior angles- two nonadjacent interior angles Polygon- a closed plane figure with at least three sides that are segments Convex Polygon- has no diagonal with points outside the polygon Concave Polygon- has at least one diagonal with points outside the polygon Equilateral polygon- all sides congruent Equiangular polygon- all angles congruent Regular polygon- is both equilateral and equiangular

Postulates & Theorems