Rotational symmetry - Orchids The International School
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Symmetry

Rotational symmetry

  • The object is said to have a rotational symmetry if after rotation the object remains the same.
  • When an object is rotated, the size and the shape of the object do not change.
  • The object can be rotated either in a clockwise or in an anticlockwise direction.
  • The clockwise direction is in the direction of the hands of the clock.
  • The anticlockwise is in the opposite direction of the hands of the clock.
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Quarter turn Rotation

  • A quarter turn (1/4) is a rotation of one right angle.
  • One right angle is equal to 90°.
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  • The image below describes a quarter-turn in a clockwise and anticlockwise direction.
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  • A figure is said to have a quarter turn symmetry if

    Examples :

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Half a turn Rotation

  • Half a turn (1/2) is a rotation of two right angles.
  • One right angle is equal to 90°. Therefore, two right angle is equal to 90° + 90° = 180°.
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  • The image below describes half a turn in a clockwise and anticlockwise direction.
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    Examples :

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Three quarter turn Rotation

  • Three quarter (3/4) turn is a rotation of three right angles.
  • One right angle is equal to 90°. Therefore, three right angle is equal to 90° + 90° + 90° = 270°.
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  • The image below describes a three-quarter turn in a clockwise and anticlockwise direction.
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Examples :

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Did you know?

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