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Dilations

Scale

Is the diagram showing an enlargement or a reduction? What is the scale factor?

Is the diagram showing an enlargement or a reduction? What is the scale factor?

What is the scale factor of the diagram? What is the distance from point D to point B?

Construction

Construct a dilation of the triangle, from the external point, with a scale factor of 2.

Construction

Construct a dilation of the triangle, from the external point, with a scale factor of 1/2.

Real World

You are using a magnifying glass. Use the length of the insect and the magnification level to determine the length of the image seen through the magnifying glass. Actual size is 60 mm Size of the image is magnified 50x Size of the image is ...?

Use the given actual and magnified lengths to determine which of the following insects were looked at using the same magnifying glass.

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  • A
  • B
  • C
  • D
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For the previous question, the scale factor for the insects looked at under the same magnifying glass is k=?