The circumference of a circle

UPDATED: A FULL LESSON on the circumference of a circle.

Assumed prior knowledge:

  • Rounding with significant figures and decimals.
  • Simplifying expressions.

We are learning about: The circumference of a circle.
We are learning to: Calculate the circumference of a circle.

Differentiated objectives:

  • Developing learners will be able to calculate the circumference of a circle given its radius or diameter.
  • Secure learners will be able to calculate the diameter or radius of a circle given its circumference.
  • Excelling learners will be able to solve unfamiliar problems using their knowledge of calculating the circumference of a circle.

Starter: Labelling a circle - starter activity

  • Worked through examples followed by exercises. Calculating the circumference and then again for calculating the diameter.
    Plenary: Spot the mistake.


  • Examples provided on printable worksheet. Similar to a bookmark shape, the students find it easy to stick this in on the (I use) left side of the page in their books. It saves time from writing down large amounts of text and drawing diagrams. More time to focus on learning!!
  • Worksheet with solutions on PPT.

Any feedback is appreciated!


Save for later
  • 2.1f-The-circumference-of-a-circle.pptx
  • 2.1f-Parts-of-a-circle.pdf
  • 2.1f-Worksheet-1.pdf
  • 2.1f-Worksheet-2.pdf
  • 2.1f-Examples.pdf

About this resource


Created: Oct 30, 2018

Updated: May 17, 2019

Whole lesson

pptx, 2 MB



pdf, 2 MB



pdf, 162 KB


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Creative Commons "Sharealike"

Creative Commons "Sharealike"