A composite rectilinear shape is a composite shape made from rectangles.

Calculating missing side lengths from the area of composite rectilinear shapes

Maths

Checking understanding of perimeter and area

Securing understanding of perimeter and area

Finding the perimeter of polygons

Calculating missing lengths with perimeter of polygons

Perimeter with composite rectilinear shapes

Area of a triangle

Using the formula for the area of a triangle

Area of composite rectilinear shapes

Area of a trapezium

Calculating missing side lengths from the area of a trapezium

Problem solving with perimeter and area

In this unit pupils learn how to derive and use the formula for the area of a triangle and trapezium. In the future unit, this knowledge is called upon to find the volume of different prisms and area of composite shapes

In this unit, pupils explored the relationship between perimeter and area. In particular, they considered whether a shape can have the same area and perimeter value

In this unit pupils investigate how to calculate the area and perimeter of rectilinear shapes, and composite shapes using rectangles and triangles. They will also derive simple area formulae.

Perimeter and area

Is it possible to determine the perimeter of this shape?

True or false? This is an example of a composite rectilinear shape.

Calculate the area of this compound rectilinear shape (you do not need to state the units).

Determine whether there is enough information to find the perimeter of this shape.

Calculating missing side lengths from the area of composite rectilinear shapes

Lesson outcome