Step-by-Step Method
Example: Favorite subjects survey of 120 students
| Subject | Frequency | Calculation | Angle |
|---|---|---|---|
| Maths | 30 | (30 ÷ 120) × 360° | 90° |
| English | 24 | (24 ÷ 120) × 360° | 72° |
| Science | 36 | (36 ÷ 120) × 360° | 108° |
| History | 18 | (18 ÷ 120) × 360° | 54° |
| Other | 12 | (12 ÷ 120) × 360° | 36° |
| Total | 120 | Check: | 360° ✓ |
Drawing the Pie Chart
- Draw a circle using a compass
- Mark the center and draw a radius to the top (12 o'clock)
- Use a protractor to measure each angle from the previous line
- Draw each sector in order (largest first helps)
- Label clearly with category names and values
This deep dive covers Creating Pie Charts within Pie Charts for GCSE Mathematics. Revise Pie Charts in Statistics for GCSE Mathematics with 14 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 3 of 8 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Pie Charts
A pie chart shows the results of a survey about favourite holiday destinations. The sectors have the following angles: - Beach: 144° - City: 90° - Countryside: 72° - Mountains: 54° Which destination is the modal category?
A newspaper reports that a pie chart shows Company A has a 'dominant market share' in the smartphone industry, with their sector taking up nearly half the chart. A critic argues that the pie chart is misleading. Explain two limitations of using a pie chart in this context, and suggest what additional information would make the chart more useful.