Surface area of composite solids
I can calculate the surface area of a composite solid.
Surface area of composite solids
I can calculate the surface area of a composite solid.
Lesson details
Key learning points
- The surface area of a composite solid is found by summing the area of all faces.
- The faces may not always be the same shape.
- The surface area may well be able to be calculated in a more efficient way.
Common misconception
Pupils may not subtract overlapping faces from their surface area calculation.
Ask the pupils to visualise turning around/rotating the compound solid, and consider which faces of the component solids would always be hidden.
Keywords
Surface area - The surface area is the total area of all the surfaces of a closed 3D shape. The surfaces include all faces and any curved surfaces.
Solid - A solid is a shape that has three dimensions (e.g. width, height and depth).
Compound shape - A compound shape is a shape created using two or more basic shapes. A composite shape is an alternative for compound shape.
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).
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