A shape has Rotational Symmetry when it still looks the same after some rotation (of less than one full turn). What often happens in platoons is that youll start seeing the same maps over and over again. for all $ t \in [ a, b] $. The rectangle has the rotational symmetry of order 2 because when it is rotated twice, we get the original shape at 180° and again when it is rotated twice, the original shape is obtained at 360°. 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