Polygons - NSW Department of Education

Polygons 2D shapes 2D shapes have two dimensions – length and width. A polygon is a 2D shape with at least three straight sides and three angles. It can be regular (all sides equal and all angles the same) or irregular (sides different lengths and angles different).

Polygon

Name

Number of sides

Number of angles

triangle

3

3

rectangle

4

4

4

4

5

5

square A square is a special type of rectangle with all its sides equal.

pentagon

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Polygon

Name

Number of sides

Number of angles

hexagon

6

6

heptagon

7

7

octagon

8

8

nonagon

9

9

decagon

10

10

These shapes are not polygons because all their sides are not straight.

For more homework help, tips and info sheets go to www.schoolatoz.com.au © Owned by State of NSW through the Department of Education and Communities 2011. This work may be freely reproduced and distributed for non-commercial educational purposes only. Permission must be received from the department for all other uses.

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