Practice Page
Directions: Read carefully!

1.
Under the dilation shown at the right, the value of x will be:
 Choose:
15.5
18
21
24
pracdi1

 

 

2.
Stanley had a poster made from a picture of his dog Tasha. The poster image is eight times the size of the picture. If the poster image is 120 cm. in height, what was the height of Stanley's original picture of Tasha (in centimeters)?

Choose:
10 cm.
12 cm.
15 cm.
20 cm.
tasha2

 

 

3.
A model ATV is 8 inches long. After a dilation, the model is 2.4 inches long. The scale factor for this dilation is ...
atv
 
Choose:
3
2.4
0.4
0.3

 

 

4.
A dilation centered at O produces image A' as shown at the right. If the scale factor is k = 3, find OA'.
dilpra109
 
Choose:
3
9
27
36

 

 

5.
The diagram at the right shows a dilation of scale factor of ½. Which segment is parallel to de5?

Choose:
e'f'
d'e'
fd
d;f
didef2

 

 

6.
In a dilation, if the scale factor is greater than one, the dilation ...

Choose:
is an enlargement.
is a congruence.
is a reduction.
cannot be determined.
dilategirl

 

 

7.
A dilation centered at O is shown at the right. The image is ΔA'B'C'.
If OA = 12 units and
OA' = 8 units, what is the scale factor of this dilation?

Choose:
2
half
2thirds
3halfs
dilprac9

 

 

8.
Which of the following statements is NOT true?

Choose:
Dilations create similar figures.
Dilations preserve angle measure.
Dilations may have a negative scale factor.
Dilations on a coordinate axis are always centered at the origin.

 

 

9.
A dilation centered at O is shown at the right. The image is ΔA'B'C'.
If OA = 3 units and AA' = 6 units, what is the scale factor of this dilation?

Choose:
2
3
half
third
diprac5

 

 

10.
Which of the following properties is NOT preserved during a dilation?

Choose:
angle measure
orientation
collinearity
distance
dilation2

 

 

11.
Which diagram shows a dilation with a scale factor between 0 and 1 where P' is the image of P ?

Choose:
line1
line5
line2
line6

 

 

12.
Which "rule" represents a dilation with center at the origin, O, on a coordinate axis?

Choose:
rule1
rule2
rule3
rule4

 

 

13.
ΔABC has A(-2,-2), B(-1,2) and
C(2,1). After a dilation centered at the origin, ΔA'B'C' has A'(-4,-4),
B'(-2,4) and C'(4,2). What is the scale factor of the dilation?

Choose:
-2
2
½
-½
Coor1

 

 

14.
Rectangle ABCD is dilated to create image A'B'C'D'.

a) What is the center of the dilation?
Choose:
origin
A
B
C

b) What is the scale factor?
Choose:
2
3
½
¼
coor2

 

 

15.
In which quadrant would the image of point (4,-5) fall after a dilation, centered at the origin, using a scale factor of -3?

Choose:
I
II
 III IV

 


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