5.2.5

Effects of Transformations

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Effects of Transformations

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Angles

  • Angles are not changed in any transformations.
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Lengths

  • Rotations, reflections and translations do not change lengths.
  • Enlargement does change lengths.
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Multiple transformations

  • Transformations can be done one after the other.
  • When transformations are combined like this, it's very important to do them in the order they are listed.
  • Here is a reflection in the y-axis, then a translation down.

Identifying Transformations

Transformations can be identified by following a few key rules.

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Rotation

  • If a shape has been rotated, it will have a different orientation.
    • A different orientation means it will be a different way around.
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Relfection

  • If a shape has been reflected, it will be a mirror image of itself.
    • This means the new shape will not be able to fit over the old shape (unless the original shape was symmetrical).
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Translation

  • If a shape has been translated, it will have the same orientation and size but a different position.
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Enlargement

  • If a shape has been enlarged, it will be larger or smaller than the original shape.
  • If the scale factor is positive, it will have have the same orientation as the original shape.
  • If the scale factor is negative, the new shape will have been rotated 180°.

Jump to other topics

1Numbers

2Equations, Formulae & Identities

3Sequences, Functions & Graphs

4Geometry

5Vectors & Transformation Geometry

6Statistics & Probability

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