MA23-03 Maths Watch
Circle circumference and area
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In this lesson
In this video you'll learn about circle circumference and area for GCSE Maths, with worked examples and the mistakes examiners report.
By the end: Apply the formulae circumference = 2*pi*r = pi*d and area = pi*r^2 to calculate circle measurements, including as one step within a larger problem.
What it covers
- 0:50 Circle circumference and area: the radius is the distance
- 3:43 A clock face has a radius of seven centimetres, and the question wants the distance round the rim
- 5:34 A rug, and this time the area
Key words
For: AQA GCSE 8300, Cambridge IGCSE 0580, Edexcel GCSE 1MA1, Edexcel IGCSE 4MA1, Eduqas GCSE C300, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | G17 | Know the formulae: circumference of a circle = 2πr = πd |
| Cambridge IGCSE 0580 | C5.3 | Carry out calculations involving the circumference and area of a circle. |
| Cambridge IGCSE 0580 | E5.3 | Carry out calculations involving the circumference and area of a circle. |
| Edexcel GCSE 1MA1 | G17 | Know the formulae: circumference of a circle = 2πr = πd, area of a circle = πr²; calculate: perimeters of 2D shapes, including circles; areas of circles and composite shapes; surface area and volume of spheres, pyramids, cones and composite solids |
| Edexcel IGCSE 4MA1 | F4.9E | Find circumferences and areas of circles using relevant formulae; find perimeters and areas of semicircles |
| Eduqas GCSE C300 | FG15 | Know the formulae: circumference of a circle = 2πr = πd, area of a circle = πr²; calculate perimeters of 2D shapes, including circles; areas of circles and composite shapes; surface area and volume of spheres, pyramids, cones and composite solids |
| Eduqas GCSE C300 | HG17 | Know the formulae: circumference of a circle = 2πr = πd, area of a circle = πr²; calculate: perimeters of 2D shapes, including circles; areas of circles and composite shapes; surface area and volume of spheres, pyramids, cones and composite solids |
| OCR GCSE J560 | 10.02b | Know and apply the formula circumference = 2πr = πd to calculate the circumference of a circle. |
| OCR GCSE J560 | 10.03d | Know and apply the formula area = πr^2 to calculate the area of a circle. |
For teachers
This GCSE Maths lesson teaches circle circumference and area. By the end, students should be able to apply the formulae circumference = 2*pi*r = pi*d and area = pi*r^2 to calculate circle measurements, including as one step within a larger problem. It works through three worked examples and the mistakes examiners report.