4.8.2

Surface Area

Test yourself

Surface Area

The surface area of a 3D shape is the total area of all its surfaces. For a shape with only flat faces, calculate the area of each face individually then add them together.

Illustrative background for CubeIllustrative background for Cube ?? "content

Cube

  • A cube of side length 3cm has 6 faces each with area 9cm2 so the total surface area is 54cm2.
  • Drawing a net can be helpful for calculating the total area.
Illustrative background for SphereIllustrative background for Sphere ?? "content

Sphere

  • The surface area of a sphere is:
    • Area = 4πr2
Illustrative background for CylinderIllustrative background for Cylinder ?? "content

Cylinder

  • The surface area of a cylinder is: Area = 2πrh + 2πr2
  • The length of the rectangular surface is the circumference of the base.
Illustrative background for ConeIllustrative background for Cone ?? "content

Cone

  • The surface of a cone is: Area = πrL + πr2
  • Where L is the slant height.

Jump to other topics

1Numbers

2Equations, Formulae & Identities

3Sequences, Functions & Graphs

4Geometry

5Vectors & Transformation Geometry

6Statistics & Probability

Unlock your full potential with Seneca Premium

  • Unlimited access to 10,000+ open-ended exam questions

  • Mini-mock exams based on your study history

  • Unlock 800+ premium courses & e-books

Get started with Seneca Premium