0580/12 May/Jun 2023, Question 3: Rotational Symmetry
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
On a 4 by 4 grid with some squares already shaded, shade two more squares so the finished pattern has rotational symmetry of order 4.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1Order 4 means the pattern looks the same after each 90° turn about the centre of the grid
- 2Row 2 column 4 turns to row 1 column 2 (not shaded yet)
- 3Row 2 column 3 turns to row 3 column 3 (not shaded yet)
- 4Shade row 1, column 2 and row 3, column 3
AnswerShade row 1, column 2 and row 3, column 3 (rows counted from the top, columns from the left)
Stuck on a step? Read the free lesson: Rotational Symmetry
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Also searched as: 0580/12/M/J/23 · 0580_s23_qp_12 · 0580 s23 12 · question 3.
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