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:


Triangle - 3 Sides

Square - 4 Sides

Pentagon - 5 Sides

Hexagon - 6 sides

Heptagon - 7 Sides

Octagon - 8 Sides

Nonagon - 9 Sides

Decagon - 10 Sides
More ...

 

Other Common Polygons


Quadrilateral
Any 4 sided 2D shape

Rectangle - 4 Sides
All right angles
And many more!

 

Curved Shapes

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


Circle - 1 Side

Ellipse - 1 Side
And many more!