Write down the order of rotational symmetry of the diagram.
Exam No：0580_s20_qp_22 Year：2020 Question No：1
Answer:
2
Knowledge points:
E4.6.1 Recognise rotational and line symmetry (including order of rotational symmetry) in two dimensions.
E4.6.2 Recognise symmetry properties of the prism (including cylinder) and the pyramid (including cone).
E4.6.3.1 equal chords are equidistant from the centre.
E4.6.3.2 the perpendicular bisector of a chord passes through the centre.
E4.6.3.3 tangents from an external point are equal in length.
Solution:
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