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0580/11 May/Jun 2021, Question 3: Lines of Symmetry

Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks

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The question, in short

A 4 by 4 grid has its four corner squares shaded; find its rotational symmetry order and draw every line of symmetry.

Summarised in our own words. Use the official paper for the exact wording and the diagram.

Part (a) · 1 mark

State the order of rotational symmetry of the shaded grid diagram.

  1. 1The diagram looks the same 4 times in one full turn
  2. 2Order of rotational symmetry = 4

Answer4

Part (b) · 2 marks

Draw all lines of symmetry on the diagram.

  1. 1Draw both diagonals of the square
  2. 2Draw the vertical and the horizontal centre lines
  3. 34 lines in total

Answer4 lines drawn: both diagonals, the vertical centre line and the horizontal centre line

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Also searched as: 0580/11/M/J/21 · 0580_s21_qp_11 · 0580 s21 11 · question 3.
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