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SASMO 2021 Grade 4 Question 7

SASMO · SASMO 2021 Grade 4

Question 7

A regular octagon is an 8-sided figure with all angles equal and all sides equal. Six regular octagons are arranged as shown. If the perimeter of the whole shape is 570 cm, what is the perimeter of each octagon?

Question illustration

The six octagons are identical and joined along the full sides shown.
  1. 120 cm
  2. 95 cm
  3. 15 cm
  4. 10 cm
  5. None of the above