The perimeter is the distance around a 2D shape.

The area is the size of the surface and states the number of unit squares needed to completely cover that surface.

Perimeter and area in a contextual setting

Maths

In this unit, pupils built upon their prior learning of the area of different shapes. In the future unit, pupils will continue to further develop their understanding of shapes by considering surface area and volume of pyramids, spheres and cones.

In the prior unit, pupils derived the formula for the circumference and area of a circle. In this unit, this knowledge is combined with knowledge of fractions to find the arc length and area of a sector.

2D and 3D shape: compound shapes

Match each type of measure with the context it could be needed for.

A single rectangular tile has the dimensions 600 mm by 450 mm and a single square tile has an edge length of 520 mm. The {{ }} tile has the larger area.

Sofia is making a picture frame. She makes the frame by cutting a long piece of wooden trim into 4 pieces. What length of wooden trim does she need to make the frame?

The total bedroom wall area cannot exceed 32.5 m².

The total bedroom wall area cannot exceed 16.25 m².

The total bedroom wall area has to be more than  32.5 m².

The total bedroom wall area has to be more than 16.25 m².

Izzy buys a tin of paint to decorate her bedroom. The tin states it will cover 32.5 m². Izzy correctly calculates that she has enough paint for two coats. Select the correct statement.

Block paving slabs cost 45 p per block. A gardener pays £112.50 for some paving slabs. The gardener buys {{ }} paving slabs.

Here is a quote for garden materials. The cost of the 24 overlap panels is £{{ }}.

Match each measurement to its size for this rectangle.

The perimeter of this parallelogram is {{ }} cm.

The perimeter of this compound shape is {{ }} cm.

The area of this compound shape is {{ }} cm².

This lesson will soon be taken down.

Perimeter and area in a contextual setting

Lesson outcome