8th Grade Chapter 9 Test Review
1. Dilate triangle ABC with P as the center of dilation and a scale factor of 3.
2. Dilate triangle ABC with P as the center of dilation and a scale factor of
3.Dilate triangle ABC on the coordinate plane using the
origin (0, 0) as the center of dilation and a scale
factor of 2.
.
4. Dilate triangle ABC on the coordinate plane using
point A (3, 3) as the center of dilation and a scale
factor of 2.
5. Dilate triangle ABC on the coordinate plane using the
origin (0, 0) as the center of dilation and a scale
factor of
8.
.
9.
6. Dilate triangle ABC on the coordinate plane using
point A (2, 1) as the center of dilation and a scale
factor of 3.
10.
Determine each missing measure.
11. Given:
Identify the congruent corresponding angles and
write ratios to identify the proportional sides of the
similar triangles in each problem.
12. Given:
7.
13. Given:
17. Given
with
centimeters,
centimeters.
centimeters, and
What is the length of
14. Triangle EFG is dilated with a scale factor of
to create
What is
a.
b.
c.
d.
. The measure of
a.
is 36.
?
?
centimeters
b. 5 centimeters
c. 4 centimeters
d. 6 centimeters
18
36
72
144

18. What is the name of the point from which a dilation
is drawn?
15. Given
true?
. Which statement must be
a.
b.
c.
d.
the vertex
the center of dilation
the origin of dilation
the corner
a.
b.
19. In the figure,
.
c.
d.
16. Triangle ABC is dilated to produce triangle
with scale factor
. Which describes the relationship
between the two triangles?
a.
b.
c.
d.
is an enlargement of
is a reduction of
is a mirror image of
.
.
.
What is the length of
a.
b.
c.
d.
3.6 centimeters
9.6 centimeters
6 centimeters
7 centimeters
?
20. Suppose
,
, and
Which is a correct similarity statement?
.
24. Triangle XYZ has been enlarged with P as the center
of dilation and scale to form triangle
.
a.
b.
c.
d.
21. Which must be true of a scale factor of a dilation if
the image is smaller than the original figure?
a.
b.
c.
d.
The scale factor is negative.
The scale factor is between 1 and 0.
The scale factor is between 0 and 1.
The scale factor is positive.
22. Given
with
inches, and
Which is the length of
a.
b.
c.
d.
inches,
inches.
?
3.6 inches
2.4 inches
8.1 inches
4 inches
23. A triangle is dilated with center of dilation at point
U. Point E is a vertex of the triangle and point E is
the corresponding vertex of the image. If
centimeters and
centimeters, what is the
scale factor?
a.
b.
c.
d.
5.0
0.2
0.2
5.0
Which is a correct conclusion?
a.
b.
c.
d.
8th Grade Chapter 9 Test Review
Answer Section
1. ANS:
REF: 9.1
2. ANS:
REF: 9.1
3. ANS:
REF: 9.1
4. ANS:
REF: 9.1
5. ANS:
REF: 9.1
6. ANS:
REF: 9.1
7. ANS:
Congruent corresponding angles:
Proportional Sides:
REF: 9.2
8. ANS:
Congruent corresponding angles:
REF: 9.2
Proportional Sides:
9. ANS:
Congruent corresponding angles:
Proportional Sides:
REF: 9.2
10. ANS:
Congruent corresponding angles:
REF: 9.2
11. ANS:
REF: 9.2
12. ANS:
REF: 9.2
Proportional Sides:
13. ANS:
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
REF:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
9.2
B
A
B
C
B
A
D
C
A
D
A
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
9.1
9.2
9.1
9.2
9.1
9.2
9.2
9.1
9.2
9.1
9.1