G-SRT.1.1.a

Verify experimentally the properties of dilations given by a center and a scale factor:

a.  A dilation takes a line not passing through the center of the dilation to a parallel line, and leaves a line passing through the center unchanged.

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Students are asked to dilate a line segment and describe the relationship between the original segment and its image.
Dilation of a Line Segment
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Students are asked to graph the image of two points on a line after a dilation using a center on the line and to generalize about dilations of lines when the line contains the center.
Dilation of a Line: Center on the Line
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Students are asked to graph the image of three points on a line after a dilation using a center not on the line and to generalize about dilations of lines when the line does not contain the center.
Dilation of a Line: Factor of One Half
Virtual/Hands-on Manipulatives
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Students use a slider to explore dilation and scale factor. Students can create and dilate their own figures.
Transformations – Dilation
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Students begin by using the context of skytyping to create a message and translate it into a set of coordinates.
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Dilating a Line
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