2D Shapes

Regular Polygons

A polygon is a plane (2D) shape with straight sides.
To be a regular polygon all the sides and angles must be the same:

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


Curved Shapes

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

2d circle
2d ellipse
And many more!