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Common Rotations
(KS2, Year 6)

hometransformationsthe common rotations
A rotation can be by any angle about any center of rotation. However, it can be time consuming to rotate a shape and even more difficult to describe a rotation. Rotations of 90°, 180°, 270° and 360° about the origin, however, are relatively simple.

A Rotation of 90° About the Origin

The shape below has been rotated 90° (one quarter turn) clockwise about the origin: describe_rotation_90_degrees

A Rotation of 180° About the Origin

The shape below has been rotated 180° (one half turn) clockwise about the origin: describe_rotation_180_degrees

A Rotation of 270° About the Origin

The shape below has been rotated 270° (three quarter turns) clockwise about the origin: describe_rotation_270_degrees

A Rotation of 360° About the Origin

The shape below has been rotated 360° (one whole turn) clockwise about the origin:describe_rotation_360_degrees

Top Tip

How to Think of Rotations About the Origin

Imagine a shape is drawn on a pair of axes on a sheet of paper...rotation_shape_and_axes_on_paperImagine sticking a pin through the origin and into a surface...rotation shape and axes on paper with pinIf you span the paper around, the pin would stay in place and every other point on the paper would turn in a circle around it. By turning the paper in a series of one... two... three... four quarter turns, the rotations described on this page can be found. rotation shape and axes on paper with pin spin

Note

Clockwise and Counter-Clockwise

The direction of rotation is needed to describe a rotation.
  • If the rotation is in the same direction as the hands of a clock, the direction is clockwise. clockwise_mini
  • If the rotation is in the opposite direction as the hands of a clock, the direction is counter-clockwise or anti-clockwise.

    counter-clockwise_mini

A Rotation Can Be Described as Both Clockwise and Counter-Clockwise

Any rotation can be described as both clockwise and clockwise. The rotation below can be described as both 90° clockwise and 270° counter-clockwise:

rotation clockwise and counter-clockwise If a rotation is θ clockwise, it is 360 − θ counter-clockwise.
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This page was written by Stephen Clarke.

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