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Regular 2-D Shapes - Polygons

Move the mouse over the shapes to discover their properties.

Triangle - 3 Sides
Triangle		 Square - 4 Sides
Square
Pentagon - 5 Sides
Pentagon		 Hexagon - 6 sides
Hexagon
Heptagon - 7 Sides
Heptagon		 Octagon - 8 Sides
Octagon
Nonagon - 9 Sides
Nonagon		 Decagon - 10 Sides
Decagon
Hendecagon - 11 Sides
Hendecagon		 Dodecagon - 12 Sides
Dodecagon
These shapes are known as regular polygons. A polygon is a many sided shape with straight sides.

To be a regular polygon all the sides and angles must be the same.
Polygons (more detail) Geometry Index
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