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Different types of polygons

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Term
Definition
Polygon   A many sided closed figure named according to the number of angles and sides they have- Greek word "poly" means many; Greek word "gon" means angles  
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Equilateral Polygon   All sides are congruent  
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Equiangular Polygon   All sides are congruent  
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Regular Polygon   All sides and all angles are congruent  
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Vertices   Endpoints of the sides of a polygon  
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Diagonal   Line segment connecting two nonadjacent vertices in a polygon  
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Convex Polygon   No diagonals contains points outside the polygon; no angle greater than 180°; a line crosses at most two sides.  
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Concave Polygon   Lines can be drawn outside the polygon; at least one interior angle is greater than 180°(reflex angle); at least one line can be drawn across more than two sides  
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Quadrilateral   Four side, four angles, and four vertices  
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Parallelogram   Quadrilateral with both pairs of opposite sides parellel and congruent  
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Rhombus   Parallelogram with four congruent sides  
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Rectangle   Parallelogram with four right angles  
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Square   Parallelogram with four congruent sides and four right angles  
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Kite   Quadrilateral with two pair adjacent sides congruent and no opposite sides congruent  
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Trapezoid   Quadrilateral with exactly one pair of parallel sides  
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Isosceles Trapezoid   Trapezoid whose nonparallel sides are congruent  
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Right Trapezoid   Trapezoid with two right angles  
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Pentagon   Five sided polygon, five angles, five vertices  
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Hexagon   Six sided polygon, six angles, six vertices  
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Heptagon   Seven sided polygon, seven angles, seven vertices  
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Octagon   Eight sided polygon, eight angles, eight vertices  
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Nonagon   Nine sided polygon, nine angles, nine vertices  
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Decagon   Ten sided polygon, ten angles, ten vertices  
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Dodecagon   Twelve sides, twelve angles, twelve vertices  
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n-gon   n sides, n angles, n vertices  
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Created by: Joanne02468
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