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

A compound shape is a shape created using two or more basic shapes.

A composite shape is an alternative for a compound shape.

Checking and securing understanding of area for compound shapes

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

A composite rectilinear shape is a composite shape made from {{ }}. 

Laura uses the calculation 3 × 1.5 + 11 × 4 to work out the area of this composite rectilinear shape. Which diagram shows the way that Laura has subdivided the shape?

This compound rectilinear shape has been completed to make a rectangle. The additional rectangle has an area of {{ }} cm².

This compound rectilinear shape has been completed to make a rectangle. Which of the following calculations are correct for finding the area of this composite rectilinear shape?

...a rectangle with dimensions of 20 m by 12 m

...a rectangle with dimensions of 19 m by 12 m

By rearranging the area, this compound shape is equivalent to ...

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

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

The area of this rectangle is {{ }} cm².

The area of this parallelogram is {{ }} cm².

The length of the edge marked 'b' is {{ }} cm.

Which of these shapes has a different area to the other three?

This lesson will soon be taken down.

Checking and securing understanding of area for compound shapes

Lesson outcome