← 3.1 Circles

Working backwards from the circumference

Mathematics · Grade 8 · about 40 minutes

Finding a diameter or radius from a known circumference, and using circumference to work out how far a wheel travels.

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Other lessons in this sub-strand

  1. The circumference of a circle
  2. Working backwards from the circumference
  3. The length of an arc
  4. The perimeter of a sector
  5. Circles and sectors in real life