0580/12 Feb/Mar 2021, Question 1: Lines of Symmetry
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 3 marks
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The question, in short
A bow-tie shape made from two congruent triangles is shown; find its rotational symmetry order and draw every line of symmetry on the diagram.
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 bow-tie shape.
- 1The shape looks the same twice in a full turn (after 180° and 360°)
- 2Order of rotational symmetry = 2
Answer2
Part (b) · 2 marks
Draw all lines of symmetry on the given diagram.
- 1Draw a line through the meeting point along the length of the bow tie (through both triangles)
- 2Draw a second line through the meeting point at right angles to the first
- 3These 2 lines are the lines of symmetry
Answer2 correct lines
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Also searched as: 0580/12/F/M/21 · 0580_m21_qp_12 · 0580 m21 12 · question 1.
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