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Answer :

(a) Order of rotational symmetry = 360°/180°=2

(b) Order of rotational symmetry = 360°/180°=2

(C) Order of rotational symmetry = 360°/120°=3

(d) Order of rotational symmetry = 360°/90°=4

(e)Order of rotational symmetry = 360°/90°=4

(f) Order of rotational symmetry = 360°/72°=5

(g) Order of rotational symmetry = 360°/60°=5

(h) Order of rotational symmetry = 360°/120°=3

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