7.1 Dilations

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•
Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a dilation in geometry?
Back
A dilation is a transformation that alters the size of a figure but not its shape, using a center point and a scale factor.
2.
FLASHCARD QUESTION
Front
What is the scale factor in a dilation?
Back
The scale factor is the ratio of a length of the new figure to the corresponding length on the original figure.
3.
FLASHCARD QUESTION
Front
How do you calculate the coordinates of a point after dilation?
Back
To find the coordinates of a point after dilation, multiply the original coordinates by the scale factor.
4.
FLASHCARD QUESTION
Front
What happens to a figure when the scale factor is greater than 1?
Back
When the scale factor is greater than 1, the figure is enlarged.
5.
FLASHCARD QUESTION
Front
What happens to a figure when the scale factor is between 0 and 1?
Back
When the scale factor is between 0 and 1, the figure is reduced.
6.
FLASHCARD QUESTION
Front
If point B (-10, -6) is dilated with a scale factor of 1/2, what are the new coordinates?
Back
The new coordinates are (-5, -3).
7.
FLASHCARD QUESTION
Front
If point A (8, 12) is dilated to (2, 3), what is the scale factor?
Back
The scale factor is 1/4.
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