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0580/13 May/Jun 2023, Question 5: Lines of Symmetry

Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 3 marks

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The question, in short

A 3 by 3 grid has three shaded squares at top-right, centre and bottom-left; find its rotational symmetry order and draw all lines 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 pattern.

  1. 1The pattern looks the same after a half turn (180°) but not after 90°
  2. 2Order 2

Answer2

Part (b) · 2 marks

Draw every line of symmetry on the grid diagram.

  1. 1The shaded squares lie on the diagonal from bottom-left to top-right: draw that diagonal
  2. 2Reflecting in the other diagonal also swaps top-right and bottom-left: draw it too
  3. 3Both diagonals of the grid (2 lines of symmetry)

AnswerBoth diagonals of the square grid drawn (2 lines of symmetry)

Stuck on a step? Read the free lesson: Lines of Symmetry

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Also searched as: 0580/13/M/J/23 · 0580_s23_qp_13 · 0580 s23 13 · question 5.
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