2D Shapes - Polygons And More - Math Is Fun

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2D Shapes

A plane or 2D shape has 2 Dimensions (such as width and height) but no thickness.

Regular Polygons

A polygon is a 2D shape with straight sides. A regular polygon has all sides equal and all angles equal:

2d triangle Triangle - 3 Sides 2d square Square - 4 Sides
2d pentagon Pentagon - 5 Sides 2d hexagon Hexagon - 6 sides
2d heptagon Heptagon - 7 Sides 2d octagon Octagon - 8 Sides
2d nonagon Nonagon - 9 Sides 2d decagon Decagon - 10 Sides
More ...

Other Common Polygons

These are 2D shapes, and they are polygons, but not regular polygons:

2d quadrilateral Quadrilateral Any 4 sided 2D shape 2d rectangle Rectangle - 4 Sides All right angles
And many more!

Curved Shapes

These are also 2D shapes that are not polygons because they have curves:

2d circle Circle 2d ellipse Ellipse
And many more!

3D Shapes

There are plenty of 3D shapes too!

6699, 2736, 6705, 6711, 1746, 1748, 1749, 3220, 3221, 3222 Polygons (more detail) 3D Shapes Geometry Index

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