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Surface Area of Cuboids Flashcards
GCSE Mathematics (Edexcel) 1MA1
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Surface area of a cuboid
The total area of all six rectangular faces of the cuboid.
Formula for surface area of a cuboid
Surface area = 2lw + 2lh + 2wh, where l = length, w = width, and h = height.
Number of faces on a cuboid
A cuboid has 6 rectangular faces.
Opposite faces of a cuboid
Opposite faces of a cuboid are equal in area.
How to calculate the area of one face of a cuboid
Multiply the length and width of the face.
Why multiply by 2 in the surface area formula
Each pair of opposite faces has the same area, so their areas are doubled.
Units for surface area
Surface area is measured in square units, e.g., cm², m².
Key step in finding surface area
Calculate the area of each pair of opposite faces and add them together.
Surface area of a cube
For a cube with side length s, surface area = 6s².
Common mistake when calculating surface area
Forgetting to multiply by 2 for each pair of opposite faces or using incorrect units.
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