
Dilations and Similar Triangles
Authored by Anthony Clark
Mathematics
12th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Choose the correct scale factor:
2
3
1/3
1/2
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Figure D´E´F´G´ is a dilation with center (0, 0) of figure DEFG. What is the scale factor?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the value of x, and use it to find KM.
x = 10, KM = 25
x = 11, KM = 28
x = 13.3 KM = 34.9
x = 4.3, KM = 8
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A dilation always produces a similar figure. Similar figures have the same ______ but different ______.
measure; shapes
sizes; shapes
value; measures
shape; sizes
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which must be true of a scale factor of a dilation if the image is smaller that the pre-image?
The scale factor is positive
The scale factor is greater than 1
The scale factor is between 0 and 1
The scale factor is negative
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 1/2.
(5,3)
(20,12)
(-20,-12)
(-5,-3)
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Rectangle ABCD is dilated by a scale factor of 1/2 with the center at B. What are the coordinates of point D?
(6,4)
(3,2)
(4,7)
(12,8)
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