What is a dilation in geometry?
Math 8: 2.1-4 Review, Dilations

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Mathematics
•
7th - 8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A dilation is a transformation that changes the size of a figure but not its shape, using a center point and a scale factor.
2.
FLASHCARD QUESTION
Front
What does the scale factor in a dilation represent?
Back
The scale factor indicates how much the figure is enlarged or reduced. A scale factor greater than 1 enlarges the figure, while a scale factor less than 1 reduces it.
3.
FLASHCARD QUESTION
Front
If the scale factor is 2, how does the size of the figure change?
Back
The figure is enlarged to twice its original size.
4.
FLASHCARD QUESTION
Front
If the scale factor is 1/2, how does the size of the figure change?
Back
The figure is reduced to half its original size.
5.
FLASHCARD QUESTION
Front
What happens to the angles of a polygon during a dilation?
Back
Dilations do not change the angles of a polygon; they remain the same.
6.
FLASHCARD QUESTION
Front
How do you determine the new coordinates of a point after dilation?
Back
To find the new coordinates, multiply the distance from the center of dilation to the point by the scale factor.
7.
FLASHCARD QUESTION
Front
What is the center of dilation?
Back
The center of dilation is the fixed point in the plane about which all points are expanded or contracted.
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