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 3D Circles
Grab some real life cones, cylinders, spheres, prisms (sellotape, a tin can, football, tennis ball etc) and print these templates with formulae prompts, for students find the volumes.
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Pi
Set of slides that I use when introducing circles. As a slideshow or as a Word doc. Includes Pi as shown here, to 8dp with a catchy phrase, to 30dp and to 100's of dp just for fun! (see below).
More phrases created by pupils to remember Pi. |
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 Pi to 50,000 dp
Yes, its Pi to 50,000 decimal places! Just because I found it (on a link from the Dr Math website) and just because we can! Its a Word doc, 14 or 15 pages long, size 12pt font. Should get across the idea that Pi does indeed go on forever! |
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Circle Links
Flowchart linking circle formulae for radius, diameter, circumference, and area. Forwards and backwards. Print version.
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 Circles
Lots of activities involving circle formula
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Area of Circles
Demonstrates nicely by making you consider why the formula for the area of a circle is what it is
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ISS Earth Circumference
KS3 and GCSE, circles (circumference formula) activity.
Real life application of circumference of a circle formula to work out the circumference of the Earth using altitude, speed and orbital time of the International Space Station. A good extension task is to then find percentage error between this answer and actual answer.
The answer and the workings.
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Circle Questions
Word questions about circle area & circumference using formulae forwards & 'backwards'. Leads niceley into ISS Earth Circumference. |
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More Circle Questions
Find these composite areas which are based on circles. The blue areas are particularly interesting and more suited to GCSE students. Includes some answers. PDF here. |
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Mixed Circle Questions
A mix of questions about circle area & circumference using formulae forwards & 'backwards'. |
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The Fairy Godmothers Magical Circles Practice
Not really written by the fairy godmother and not very magical either, but it sure is circles practice! |
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 Circle Sectors
Print off a circle, or set of circles, with as many sectors as you choose (1 - 20+) by using the spinner. Useful for circle topics, pie charts and others. |
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Circle Theorems
A talk through show of the 5 'angles in circles' facts that pupils need to know.
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