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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:  Measurement

Curriculum subtopic:  Measure and Calculate Shapes

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

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.

 

Example

Calculate the perimeter of the shape.

Perimeter
 3 cm 
 
 

Answer

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.

Shape perimeter
 10 cm 
 
 

 

Remember to write the answer in cm.

Calculate the perimeter of the shape.

Pentagon perimeter
 5 cm 
 
 

Remember to write the answer in cm.

Calculate the perimeter of the shape.

Octagon perimeter
 6 cm 
 
 

Remember to write the answer in cm.

Calculate the perimeter of the shape.

Octagon perimeter
 10 cm 
 
 

 Remember to write the answer in cm.

Calculate the perimeter of the shape.

Shape perimeter
 10 cm 
 
 

 Remember to write the answer in cm.

Calculate the perimeter of the shape.

Shape perimeter
 8 cm 
 
 

 Remember to write the answer in cm.

Calculate the perimeter of the shape.

Octagon perimeter
 6 cm 
 
 

Remember to write the answer in cm.

Calculate the perimeter of the shape.

Octagon perimeter
 5 cm 
 
 

Remember to write the answer in cm.

Calculate the perimeter of the shape.

Shape perimeter
 9 cm 
 
 

 Remember to write the answer in cm.

Calculate the perimeter of the shape.

Shape perimeter
 7 cm 
 
 

 Remember to write the answer in cm.

  • Question 1

Calculate the perimeter of the shape.

Shape perimeter
 10 cm 
 
 

 

Remember to write the answer in cm.
CORRECT ANSWER
70cm
70 cm
EDDIE SAYS
10 x 7 = 70 cm
  • Question 2

Calculate the perimeter of the shape.

Pentagon perimeter
 5 cm 
 
 

Remember to write the answer in cm.

CORRECT ANSWER
25 cm
25cm
EDDIE SAYS
5 x 5 = 25 cm
  • Question 3

Calculate the perimeter of the shape.

Octagon perimeter
 6 cm 
 
 

Remember to write the answer in cm.

CORRECT ANSWER
48cm
48 cm
EDDIE SAYS
8 x 6 = 48 cm
  • Question 4

Calculate the perimeter of the shape.

Octagon perimeter
 10 cm 
 
 

 Remember to write the answer in cm.

CORRECT ANSWER
80 cm
80cm
EDDIE SAYS
8 x 10 = 80 cm
  • Question 5

Calculate the perimeter of the shape.

Shape perimeter
 10 cm 
 
 

 Remember to write the answer in cm.

CORRECT ANSWER
100cm
100 cm
EDDIE SAYS
10 x 10 = 100 cm
  • Question 6

Calculate the perimeter of the shape.

Shape perimeter
 8 cm 
 
 

 Remember to write the answer in cm.

CORRECT ANSWER
72 cm
72cm
EDDIE SAYS
9 x 8 = 72 cm
  • Question 7

Calculate the perimeter of the shape.

Octagon perimeter
 6 cm 
 
 

Remember to write the answer in cm.

CORRECT ANSWER
48 cm
48cm
EDDIE SAYS
8 x 6 = 48 cm
  • Question 8

Calculate the perimeter of the shape.

Octagon perimeter
 5 cm 
 
 

Remember to write the answer in cm.

CORRECT ANSWER
40cm
40 cm
EDDIE SAYS
8 x 5 = 40 cm
  • Question 9

Calculate the perimeter of the shape.

Shape perimeter
 9 cm 
 
 

 Remember to write the answer in cm.

CORRECT ANSWER
81cm
81 cm
EDDIE SAYS
9 x 9 = 81 cm
  • Question 10

Calculate the perimeter of the shape.

Shape perimeter
 7 cm 
 
 

 Remember to write the answer in cm.

CORRECT ANSWER
49cm
49 cm
EDDIE SAYS
7 x 7 = 49 cm
---- OR ----

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