Scale factor Section 97 Identify and Perform Dilations Recall A dilation is a transformation in which the original figure and its image are similar Slightly New Stuff If the scale factor of the image over the preimage is greater than 1 the dilation is an enlargement ID: 1044910
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1. Do NowIf , find the value of each:Scale factor
2. Section 9.7 Identify and Perform Dilations
3. RecallA dilation is a transformation in which the original figure and its image are similar.
4. Slightly New StuffIf the scale factor of the image over the preimage is greater than 1, the dilation is an enlargement.If the scale factor of the image over the preimage is between 0 and 1, the dilation is a reduction.
5. Example 1Find the scale factor of the dilation. Then tell whether the dilation is a reduction or enlargement.
6. Example 2Find the scale factor of the dilation. Then tell whether the dilation is a reduction or enlargement.
7. Example 3
8. Example 4A segment has the endpoints and . Find the image of after a rotation about the origin followed by a dilation with its center at the origin and a scale factor of 2.