JENECONKMaths Universe

Pie Charts

Ages 9–13

Difficulty adapts to you

Pie Charts

A pie chart is a circle divided into slices. Each slice represents a proportion of the total. The whole circle (360°) represents 100% of the data.

Your goals

  • ✓You can read and interpret pie charts.
  • ✓You can use sector, proportion correctly.
  • ✓You can make sure all sectors together represent 100% or 360°.

Words to know

sector:
A slice of a circle between two radii.
proportion:
A part compared with the whole.

Examples

  • 1If 25% of students like football, the slice is 25% of 360° = 90°.
  • 2A bigger slice means a bigger proportion of the total.

Check these

  • • Do not compare only the curved edges instead of the sector angles.
  • • Keep every number, symbol, label, and unit in its correct place.
  • • Show enough working to check how you reached your answer.

Helpful habits

  • • Read the whole question before choosing what to do.
  • • Show one clear step at a time and check each step.
  • • If you are stuck, draw a model, try smaller numbers, or revisit the example.

Now try your own

Create your own pie charts example, solve it, and explain how you checked it.

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Helpful Hints

“Calculators are tools, not replacements for thinking!”