GCSE Maths (AQA)

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Surface Area of a Cylinder

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Geometry and Measures Mensuration and Calculation

Surface Area of a Cylinder

5:18 Curved 3D Shape Calculations
Spec G17
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  • The surface area of a cylinder is the combined area of all of its exposed faces
  • The formula for the surface area of a cylinder is 2��r^2 + 2��rh
  • The areas of the circular faces are calculated using the equation for the area of a circle, which is ��r^2
  • The curved face of a cylinder can be flattened out into a rectangle with a width of 2��r and a height of h
  • The curved area of the cylinder is equal to the height times the width of the rectangle, which is 2��rh
  • To calculate the surface area of a cylinder, you need to calculate the areas of the circular faces and the curved face separately, and then add them together
  • The surface area of a cylinder can be left in terms of �� for accuracy, or rounded to a specific number of significant figures (3SF in the example)

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