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4MA1/2F Jun 2021, Question 2: Rotational Symmetry

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 5 marks

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The question, in short

State a square's rotational symmetry order, measure and name angle x, and identify a 3-D shape and count its edges.

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

Part (a) · 1 mark

Give the number of rotational symmetry orders for a square.

  1. 1A square fits onto itself 4 times in a full turn.

Answer4

Part (bi) · 1 mark

Use a protractor to find the size of angle x.

  1. 1Measure the angle marked x with a protractor.
  2. 2The angle measures 54°.

Answer54 (accept 52 to 56)

Part (bii) · 1 mark

Give the mathematical term for the kind of angle x.

  1. 1An angle less than 90° is called an acute angle.

AnswerAcute

Part (ci) · 1 mark

Give the correct mathematical name for the pictured 3-D shape.

  1. 1The base is a square and the shape has triangular faces meeting at a point.
  2. 2This is a square-based pyramid.

Answer[Square based] Pyramid

Part (cii) · 1 mark

Count and state how many edges the 3-D shape has.

  1. 1Count the edges: 4 around the base and 4 from each corner of the base to the apex.
  2. 24 + 4 = 8

Answer8

Stuck on a step? Read the free lesson: Rotational Symmetry

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