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### 8 Cards in this Set

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 RADIUS The _______ of a regular polygon is the distance from the center of the polygon to the vertex. APOTHEM The _______ is the distance from the center of a regular polygon to the midpoint of the side of the polygon. The ________ must also be perpendicular to the side of the polygon. CONCAVE POLYGON A polygon where the line connecting any two points inside the polygon will go outside of the polygon. CONVEX POLYGON A polygon where the line connecting any two points inside the polygon lies wholly inside the polygon. A _______ is a simple closed figure. It is made up of line segments and never contains curved lines. POLYGON In a ______ ________, all of the sides have equal length and all of the interior angles have equal measure REGULAR POLYGON The ______ of a polygon are the points on the corners where two line segments come together. VERTICES (PLURAL OF VERTEX) TYPES OF POLYGONS Triangle - 3 sides Quadrilateral - 4 sides Pentagon - 5 sides Hexagon - 6 sides Heptagon - 7 sides Octagon - 8 sides Nonagon - 9 sides Decagon - 10 sides Dodecagon - 12 sides n-gon - "n" sides