Circumference of a circle

A complete lesson (or maybe two) for introducing the circumference rule.

Activities included:

Starter:
Prompts for pupils to discuss and share definitions for names of circle parts.

Main:

• Link to an online geogebra file (no software required) that demonstrates the circumference rule.
• Quickfire questions to use with mini whiteboards.
• A worksheet of standard questions with a progression in difficulty.
• A set of four challenging problems in context, possibly to work on in pairs.

Plenary:
Pupils could discuss answers with another pair, or there could be a whole-class discussion of solutions (provided)

Printable worksheets and answers included.

Please review it if you buy as any feedback is appreciated!