Checking and securing understanding of area for compound shapes
I can calculate the area of compound shapes made from rectangles, triangles, parallelograms and trapeziums efficiently.
Checking and securing understanding of area for compound shapes
I can calculate the area of compound shapes made from rectangles, triangles, parallelograms and trapeziums efficiently.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- There are multiple ways to find the area of compound shapes.
- The most efficient method may depend on the features of the shape.
- A method is to break the shape into shapes you can find the area of.
- A method is to complete the shape.
- A method is to rearrange the shape.
Keywords
Area - The area is the size of the surface and states the number of unit squares needed to completely cover that surface.
Compound shape - A compound shape is a shape created using two or more basic shapes.
Composite shape - A composite shape is an alternative for a compound shape.
Common misconception
Pupils may multiply all given lengths.
Remind pupils that area is found by multiplying two perpendicular lengths from the shape and in some cases a coefficient (half for a triangle, pi for a circle). Trapeziums use the mean length of the parallel sides (one length).
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
