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Perimeter: How Big is the Polygon?

In this worksheet, students work out the perimeter of a regular 2D polygon.

'Perimeter: How Big is the Polygon?' worksheet

Key stage:  KS 2

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   2D Shapes: Triangles, Quadrilaterals and Polygons

Difficulty level:  

Worksheet Overview

In this worksheet, work out the perimeter of a regular 2D polygon.

Perimeter is the total distance around the outside of a 2D shape. Calculate the perimeter by adding together the length of all the sides.

Remember that in a regular polygon, all the sides are the same length.



Calculate the perimeter of the shape.

 3 cm 


First count the number of sides.

There are 5 sides in this shape (pentagon).

It is regular so each side is 3 cm long.

The perimeter is 5 x 3 = 15 cm


Remember the answer is 15 cm not just 15.

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