 # Perimeter: How Big is the Polygon?

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

Curriculum topic:   Maths and Numerical Reasoning

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

Difficulty level:   ### QUESTION 1 of 10

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

Perimeter is the total distance around the outside of a 2D shape. You can calculate it by adding together the length of all the sides.

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

Example

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

Calculate the perimeter of the shape.  10 cm Calculate the perimeter of the shape.  5 cm Calculate the perimeter of the shape.  6 cm Calculate the perimeter of the shape.  10 cm Calculate the perimeter of the shape.  10 cm Calculate the perimeter of the shape.  8 cm Calculate the perimeter of the shape.  6 cm Calculate the perimeter of the shape.  5 cm Calculate the perimeter of the shape.  9 cm Calculate the perimeter of the shape.  7 cm • Question 1

Calculate the perimeter of the shape.  10 cm 70cm
70 cm
• Question 2

Calculate the perimeter of the shape.  5 cm 25 cm
25cm
• Question 3

Calculate the perimeter of the shape.  6 cm 48cm
48 cm
• Question 4

Calculate the perimeter of the shape.  10 cm 80 cm
80cm
• Question 5

Calculate the perimeter of the shape.  10 cm 100cm
100 cm
• Question 6

Calculate the perimeter of the shape.  8 cm 72 cm
72cm
• Question 7

Calculate the perimeter of the shape.  6 cm 48 cm
48cm
• Question 8

Calculate the perimeter of the shape.  5 cm 40cm
40 cm
• Question 9

Calculate the perimeter of the shape.  9 cm 81cm
81 cm
• Question 10

Calculate the perimeter of the shape.  7 cm 49cm
49 cm
---- OR ----

Sign up for a £1 trial so you can track and measure your child's progress on this activity.

### What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started 