Transformations: Part Three: Rotation

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TransformationsPart Three Rotation
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Lesson Objectives

• To be able to Rotate a shape around a given point

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What 3 pieces of information do you need to be
able to rotate a shape?
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Rotate clockwise through 900
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Rotate this shape clockwise through 90 0 about
the point c.
c
90 clockwise
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Rotate this shape anticlockwise through 1800
about the point c.
c
180 anticlockwise
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Rotations

• A rotation turns a shape about a fixed point.
• This point is called the centre of rotation.
• You need three things to describe a rotation
• 1) the direction of the rotation (clockwise or
  anti-clockwise)
• 2) the angle (900, 1800, 2700)
• 3) the centre of rotation (always give as a
  co-ordinate)