Calculate the area of shapes made from 2 or more rectangles
I can calculate the area of shapes made from 2 or more rectangles.
Calculate the area of shapes made from 2 or more rectangles
I can calculate the area of shapes made from 2 or more rectangles.
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Lesson details
Key learning points
- To find the area of a rectangle you multiply the length by the width.
- Compare different methods to decompose shapes and decide which is the most efficient.
- Choose the most efficient calculation strategies to calculate the area of a compound rectilinear shape.
Keywords
Compound - A compound shape is made up of two or more shapes.
Common misconception
There is only one way to split a compound shape to calculate the area.
Make time in the lesson to model and discuss different ways of calculating the area of compound shapes. Include strategies that move parts of the shape to simplify the shape and the calculations needed.
To help you plan your year 5 maths lesson on: Calculate the area of shapes made from 2 or more rectangles, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 5 maths lesson on: Calculate the area of shapes made from 2 or more rectangles, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 2 maths lessons from the Link area of rectangles to multiplication unit, dive into the full primary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the multiplication equation to the correct answer.
= 200
= 240
= 250
= 210
Q2.Which of these compound shapes has the largest area?
Q3.Which would be the most efficient strategy to calculate the area of this compound rectilinear shape?
Q4.What are the missing dimensions for the square?
Q5.Tick all the possible pairs of dimensions from the list.
Q6.The area of this compound shape is 227 cm². What is the missing dimension?
Assessment exit quiz
6 Questions
Q1.A shape is one that is made up of two or more shapes.
Q2.This is an image of the French flag. It consists of three rectangles of equal size. Calculate the area of the blue part. cm²
Q3.This image is of the flag from the Netherlands. It consists of three rectangles of equal size. Calculate the total area of the flag. cm²
Q4.This rectilinear shape is made up of four identical rectangles. Choose an efficient method to calculate the area. A = cm²
Q5.Laura has chosen to decompose this compound rectilinear shape into two rectangles. Which multiplications will she use to help calculate the area?
Q6.To calculate an area of the playground, Lucas has chosen to calculate the whole area and then subtract the missing part. Correctly order the calculations that he would do.
