Properties of Polygons

Properties of Polygons

GCSE(F),

A list of the more important polygons is given below. A polygon is a 2D shape that consists only of straight sides.

SidesNameSpecial type
3TriangleEquilateral triangle
4QuadrilateralSquare
5Pentagon
6Hexagon
7Heptagon
8Octagon
9Nonagon
10Decagon

Examples

1. What is the name of a regular 3-sided polygon?

Answer: Equilateral Triangle

Note that the only regular triangle is an equilateral triangle.

2. Is a rhombus (a parallelogram with 4 sides of equal length) a regular polygon?

Answer: No

There are two sizes of angles in a rhombus. It is therefore not a regular polygon.