Short Description
2D has two axes, x and y.
Shapes
-gons
Triangles
Triangles are 3 sided shapes.
Quadrilaterals
Quadrilaterals are 4 sided shapes
Pentagons
Pentagons are 5 sided shapes
Hexagons
Hexagons are 6 sided shapes
Heptagons
Heptagons are 7 sided shapes
Octogons
Octogons are 8 sided shapes
Decagons
Decagons are 10 sided shapes
Polygons
Because there are an infinite amount of 2D polygons, all of them can't be listed.
Non-polygons
Circles
Circles are shapes with no sides or angles. Circles are topologically a "1-sphere", and they have another type: Ovals.