Terms, Definitions, T/F, Fill in the Blank
A transformation that changes the size but not the shape of a geometric figure
dilation
A line is 5 cm and after a dilation becomes 10 cm. What is the scale factor?
2
Length of line: 10 cm. Using a scale of factor of 2, how long is the new line?
20 cm
True or False: A dilation changes the angle measures of a shape
false
what is the point called that is used to do a dilation?
Hint: It's similar to the name "Center of rotation".
What is center of dilation?
a line has a length of 20 cm and then after a dilation becomes 10 cm. What is the scale factor?
0.5
A line is 20 cm long. Using a scale factor of 0.5, what is the length of the new line?
10 cm
True or false: a dilation changes all the sides of a shape by the same scale factor.
true
A triangle has the side lengths, 2, 4 and 6. After a dilation, the new side lengths are 4, 8 and 12. What is the scale factor used?
2
A triangle has the side lengths of 3, 5, and 8. Using a scale factor of 2, what is the side lengths of the new triangle after the dilation?
6, 10, and 16.
In a dilation, if a scale of factor of 2 is used, does a shape become bigger or smaller?
bigger
True or false: dilation is a rigid transformation
False
A triangle has the side lengths, 4, 8 and 12. After a dilation, the new side lengths are 2, 4 and 6. What is the scale factor used?
1/2
A triangle has the side lengths of 6, 10, and 16. Using a scale factor of 0.5, what is the side lengths of the new triangle after the dilation?
3, 5, and 8.
In a dilation, if a scale of factor of 0.25 is used, does a shape become bigger or smaller?
smaller
A line has a length of 100 cm. After a dilation it is 500 cm. What is the scale factor?
5
The length of a line is 200 cm. After a dilation using a scale factor of 5, how long is the new line?
1000 cm.
In a dilation, what is it called that makes a shape bigger or smaller?
scale factor