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  • Jarrow Cross C of E Primary School
‘Living and Learning’
Value in Everyone

Monday

This week in maths, we are going to be learning how to find the area and perimeter of a shape.

 

The area of a 2D shape is the amount of space inside it.

 

The perimeter of a 2D shape is the total distance around the outside of the shape.

 

In order to do this, there are two different formulas/methods that you need to know and remember.

 

To find the area of a shape, you need to times the length of the shape by the width of the shape.

Look at the shape below for an example. The shape is not drawn to scale which means that the size of the shape is not accurate.

 

 To find the area of the shape, you would need to times the length which is 5cm by the width which is 3cm.
                 5cm                                              5cm x 3cm = 15
cm2

   3cm                 The area is 15cm2

To find the perimeter of a shape, you need to add all the sides together. For example:

               
                 5cm

 3cm

 

5cm +5cm +3cm +3cm = 16 cm2

The perimeter of the shape is 16 cm2

 

Have you noticed anything with the area and perimeter?

When working out the area and the perimeter, we used the same shape and the same numbers. However, the area and the perimeter both had a different answer.

By the end of this lesson, the aim is that you can recognise that shapes with the same area can have different perimeters and vice versa.

 

Now it’s your turn.

 

Miss Pearce and Mrs Watson’s maths group complete the sheet below.

 

Miss Wilcox and Miss Doran’s maths group complete the sheet below.

To complete these tasks, you can either write your answers in your exercise book, on the word document or you can print the sheets off. Please email in copies of your work to the distance learning email address.

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