![]() Half turn rotations are common in Escher type tessellations. Half turn rotations are when the amount of the rotation is 180 o. The centre of rotation may or may not be a point on the figure itself. S has been rotated to a new position in the plane (object S’). In the picture below, the figure is rotated 90o clockwise about the point P. The properties of size, shape and orientation remain invariant (unchanged) under the operation of rotation. In this activity students are learning about rotations.Ī rotation involves turning a figure in a plane about a given point in the plane, called the centre of rotation.
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