Circles - Free maths worksheets and other resources
Maths worksheets and PowerPoints about circles and their properties. For Circle theorems see circle theorems under 'Shapes, space and measures'.
Circumference and diameter of a circle worksheet
A worksheet containing 5 ready drawn circles for pupils to measure the diameter and circumference of using a ruler and a length of string. Pupils then divide their circumference measurements by the diameters and see if they spot a link in the answers.
A great introduction to pi.
Visit this article about teaching circumference and diameter to find out more.