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Polygons
Definition and properties of a polygon
Regular (equiangular, equilateral) Polygons
Irregular Polygons
Convex Polygons
Concave Polygons
Center of a Polygon
Central Angle of a Polygon
Interior Angles
Exterior Angles
Interior / Exterior Angles are Supplementary
Diagonals of a polygon
Triangles of a polygon
Apothem of a Polygon
Radius of a Regular Polygon (circumradius)
Circumcircle of a Polygon
Sides of a Regular Polygon
Incenter of a Regular Polygon
Incircle of a Regular Polygon
Area and perimeter
Area of a Regular Polygon
Area of an Irregular Polygon
Irregular polygon area calculator
Perimeter of a Polygon
Triangles (3 sided figures)
See Triangles Chapter
Quadrilaterals (4 sided figures)
See Quadrilaterals Chapter
Types of polygons, by number of sides
Tetragon (4 sides)
Pentagon (5 sides)
Hexagon (6 sides)
Heptagon (7 sides)
Octagon (8 sides)
Nonagon (9 sides)
Decagon (10 sides)
Undecagon (11 sides)
Dodecagon (12 sides)
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