Definitions
More Definitions!
Scale Factor
?
100
A transformation that changes the size but not the shape of a geometric figure
What is dilation?
100

This happens to a figure that is dilated with a scale factor greater than 1

What is Enlarges / Gets Bigger?

100
Preimage: (7, 2) Scale factor: 10
What is (70, 20)
100

When a figure is dilated, this stays the same

What are the Angles?

200
The center of the figure
What is center of dilation?
200

Matching parts of figures (angles or sides) that are in the same position

What is Corresponding?

200
Preimage: (3, 8) Scale factor: 5
What is (15, 40)
200

This happens to a figure when the scale factor is between 0 and 1 (0 < r < 1)

What is a Reduction / Gets Smaller?

300
Describes how much larger or smaller the image of a dilation is than the pre image
What is scale factor?
300

Having the same ratio between sides or parts of figures

What is Proportional?

300

Preimage: (2, 2) Image: (5, 5)

What is 2.5?

300

One triangle has side lengths 6, 7, and 10 units while another has side lengths 3, 4, and 5 units. Are they similar?

No

400

Figures that have the same shape but not necessarily the same size

What is Similar Figures

400

Drawn using correct measurements and accurately sized

What is Well-Scaled?

400

Segment WX is dilated by a scale factor of 1/2.  Segment W'X' measures 23.  What is the measure of segment WX?

What is 46?

400

A triangle has side lengths 5, 6, 7 and another triangle has side lengths 12.5, 15, and 17.5.  Find the scale factor.

What is 2.5?

500
A dilation is a ________ that changes the ________ but not the shape of a geometric figure.
transformation, size
500

Equal in shape and size; all angles and side lengths are the same.

What is Congruent?

500

The scale factor for a figure that has a vertex of (-6,9) and dilates to a measurement of (-2,3).

What is 1/3?

500

a comparison of two quantities of the same kind, indicating how much larger one is compared to the other.

What is a ratio?

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