GCSE Maths (Edexcel)

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Surface Area of a Sphere

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Geometry and Measures Mensuration and Calculation

Surface Area of a Sphere

1:57 Areas and Volumes of Circles and Spheres
Spec G17
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  • The surface area of a sphere is proportional to the radius squared
  • The equation for the surface area of a sphere is 4 pi r squared
  • Pi is an irrational number that represents the ratio of a circle's circumference to its diameter
  • R represents the radius of the sphere
  • The radius is the distance from the center of the sphere to any point on its surface
  • To calculate the surface area of a sphere, you need to know the radius
  • The formula for the surface area of a sphere is 4 pi r squared
  • In the example given, the sphere has a radius of 6 centimeters
  • Substituting the radius into the formula gives a surface area of 144 pi or 452 centimeters squared to three significant figures

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