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

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

 

Curved Shapes

These 2D shapes have curves, so are not polygons:

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