__2D Shapes - Polygons__
### Polygons are 2 dimensional shapes that are made up of straight sides.
### The word 'Polygon' is derived from the Greek words 'poly' meaning 'many' and 'gon' meaning 'angle' - many angles.
A Regular polygon has equal length sides and equal angles.
An Irregular polygon has sides of different lengths.
### The name of the polygon tells you how many angles it has,
the most common are:
### Pentagon - 5 sides
Hexagon - 6 sides
Heptagon - 7 sides
Octagon - 8 sides
Nonagon - 9 sides
Decagon - 10 sides
### Triangles, Rectangles and Squares are also polygons because
they are made up of straight sides.
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Play this game of shapes and spooky castles to practice with 2D Shapes
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