Chapter 1 – Essentials of Geometry

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Presentation transcript:

Chapter 1 – Essentials of Geometry 1.6 CLASSIFY POLYGONS Chapter 1 – Essentials of Geometry

Polygon means having many angles. We often think of Identifying Polygons Polygon means having many angles. We often think of polygons by their many sides.

Attributes of a Polygon Each adjacent side meet at an endpoint No two adjacent sides, with a common endpoint, are collinear Sides are always straight segments (no curves) Figure is always “closed”

Type of Polygon Convex Nonconvex (concave)

Parts of a Polygon Vertices Interior/Exterior Interior angles/Exterior angles Diagonals Perimeter Area

Special Polygons Equilateral Equiangular Regular All sides congruent All angles congruent All sides AND all angles congruent

Names of Polygons 3 4 5 6 7 8 9 10 12 n Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Nonagon Decagon Dodecagon n-gon