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4MA1/2F Jun 2019, Question 4: Rotational Symmetry

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 4 marks

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The question, in short

Five road signs A to E are shown; identify signs by symmetry properties and name an 8-sided polygon.

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

Part (a) · 1 mark

State which sign letter has exactly one line of symmetry.

  1. 1Sign A has a vertical line of symmetry through the arrow and octagon
  2. 2The others have none (writing, deer, arrows)

AnswerA

Part (b) · 2 marks

Give the letter of the sign with rotational symmetry order above 1, then state that order.

  1. 1(i) Sign D (triangle with three arrows) looks the same after turns of 120°
  2. 2(ii) It fits onto itself 3 times in a full turn, so order 3

AnswerD, 3

Part (c) · 1 mark

Name the 8-sided polygon shape of sign E.

  1. 1A polygon with 8 sides is an octagon

AnswerOctagon

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