Checking and securing understanding of perimeter for compound shapes
I can calculate the perimeter of compound shapes made from rectangles, triangles, parallelograms and trapeziums efficiently.
Checking and securing understanding of perimeter for compound shapes
I can calculate the perimeter of compound shapes made from rectangles, triangles, parallelograms and trapeziums efficiently.
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Lesson details
Key learning points
- Before calculating perimeter, consider the shape and check you know the required lengths.
- It is not necessary to know every side length.
- Sometimes you can deduce the sum of a subset of side lengths.
- Identifying where you can be more efficient can make calculations simpler.
Keywords
Perimeter - The perimeter is the distance around a 2D shape.
Compound shapes - A compound shape is a shape created using two or more basic shapes.
Composite shapes - A composite shape is an alternative for a compound shape.
Common misconception
Pupils may miss an edge when calculating the perimeter.
Encourage the pupils to trace the perimeter to check that all edges have been included in the sum.
To help you plan your year 10 maths lesson on: Checking and securing understanding of perimeter for compound shapes, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 maths lesson on: Checking and securing understanding of perimeter for compound shapes, download all teaching resources for free and adapt to suit your pupils' needs.
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Explore more key stage 4 maths lessons from the 2D and 3D shape: compound shapes unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
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Lesson video
Starter quiz
6 Questions
Exit quiz
6 Questions
