MA05-02 Maths Watch
Calculating exactly with multiples of pi
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In this lesson
In this video you'll learn about calculating exactly with multiples of pi for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to leave a circle-calculation answer as a multiple of pi instead of substituting a rounded decimal value, when the question says 'in terms of pi' or 'as a multiple of pi'.
What it covers
- 1:03 Calculating exactly with multiples of pi
- 4:06 Worked example 1: clock face
- 5:41 Your turn: plate
- 7:12 Exam technique
- 8:47 Success check
- 10:31 What's next
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | N8 | Calculate exactly with fractions |
| Edexcel GCSE 1MA1 | N8 | Calculate exactly with fractions and multiples of π |
| Eduqas GCSE C300 | FN8 | Calculate exactly with fractions and multiples of π |
| Eduqas GCSE C300 | HN8 | Calculate exactly with fractions, surds and multiples of π; simplify surd expressions involving squares (e.g. √12 = √(4 × 3) = √4 × √3 = 2√3) and rationalise denominators |
| OCR GCSE J560 | 3.03a | Use fractions in exact calculations without a calculator. |
For teachers
This GCSE Maths lesson teaches calculating exactly with multiples of pi. By the end, students should be able to leave a circle-calculation answer as a multiple of pi instead of substituting a rounded decimal value, when the question says 'in terms of pi' or 'as a multiple of pi'. It works through two worked examples and the mistakes examiners report.