AnswersCA-Math 8 BUnit Test

Unit Test — Unit test Answers

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1
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What is the sum of the measures of the exterior angles of any triangle?

A
180°
B
270°
C
360°
D
720°
2
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Which statement is true about angles 3 and 6?

Question illustration
A
They are adjacent angles.
B
They are complementary angles.
C
They are supplementary angles.
D
They are vertical angles.
3

Which angle must be complementary to angle 3?

Question illustration
A
Angle 2
Option A
B
Angle 4
Option B
C
Angle 5
Option C
D
Angle 6
Option D
4

Which is enough information to prove that ?

Question illustration
A
Angle 2 is congruent to angle 4
Option A
B
Angle 4 is congruent to angle 8
Option B
C
Angle 6 + angle 7 = 180 degrees
Option C
D
Angle 3 + angle 4 = 180 degrees
Option D
5

Lines a and b are parallel. What is the value of x?

Question illustration
A
15
B
16
C
56
D
64
6

Cynthia is finding the measures of the labeled angles in this image. What is the least number of angle measures she needs to know to find the measures of all labeled angles in the image?

Question illustration
A
She only needs to know the measure of one angle, angle D.
B
She only needs to know the measure of one angle, angle A.
C
She only needs to know the measures of two angles, angles A and B.
D
She only needs to know the measures of two angles, but one of the angles must be one of the remote interior angles.
7

The triangles below are similar. Which similarity statements describe the relationship between the two triangles? Check all that apply.

Question illustration
A
Triangle P R S is similar to triangle X Y Z
Option A
B
Triangle R S P is similar to triangle Z X Y
Option B
C
Triangle S R P is similar to triangle X Z Y
Option C
D
Triangle P S R is similar to Triangle Z Y X
Option D
E
Triangle R P S is similar to triangle Z Y X
Option E
F
Triangle S P R is similar to triangle X Z Y
Option F
8

Lines p and q are parallel. What is the measure of angle 3 in degrees?

Question illustration
A
27°
B
33°
C
60°
D
153°
9

If the measure of angle 4 is and angle 3 is , what is the measure of angle 3 in degrees?

Question illustration
A
6 degrees
Option A
B
24 degrees
Option B
C
66 degrees
Option C
D
90 degrees
Option D
10

The triangles below are similar. Which similarity statements describe the relationship between the two triangles? Check all that apply.

Question illustration
A
Triangle C B A is similar to triangle F E D
Option A
B
Triangle C B A is similar to triangle F D E
Option B
C
Triangle B A C is similar to triangle E F D
Option C
D
Triangle B A C is similar to triangle E D F
Option D
E
Triangle A B C is similar to triangle D E F
Option E
F
Triangle A B C is similar to triangle D F E
Option F
11

Lines and are parallel. Which angles represent alternate interior angles?

Question illustration
A
angles A and C
B
angles B and D
C
angles C, D, and E
D
angles B and C
12

Which is a correct name for the angle shown?

Question illustration
A
Angle A
Option A
B
Angle C
Option B
C
Angle A C B
Option C
D
Angle C B A
Option D
13

Which is enough information to prove that ?

Question illustration
A
Angle 1 is congruent to angle 3
Option A
B
Angle 2 is congruent to angle 8
Option B
C
Angle 5 + angle 6 = 180 degrees
Option C
D
Angle 1 + angle 4 = 180 degrees
Option D
14

The graph shows a line and two similar triangles.Which expression finds the equation of the line?

Question illustration
A
StartFraction y Over x EndFraction = three-halves
Option A
B
StartFraction y Over x EndFraction = two-thirds
Option B
C
StartFraction y Over 2 EndFraction = StartFraction 3 Over x EndFraction
Option C
D
StartFraction y Over 3 EndFraction = StartFraction x Over 2 EndFraction
Option D
15

The graph shows a line and two similar triangles.What is the equation of the line?

Question illustration
A
y = three-halves x
Option A
B
y = two-thirds x
Option B
C
y = 3 x
Option C
D
y = 2 x
Option D
16

What is the measure of angle B?

Question illustration
A
78°
B
92°
C
102°
D
282°
17

The measure of angle B is , and the measure of angle C is .What is the measure of angle D in degrees?

Question illustration
A
41°
B
45°
C
55°
D
125°
18

In the diagram, the measure of angle 3 is 89°, and the measure of angle 6 is 88°. What is the measure of angle 4?

Question illustration
A
88°
B
89°
C
91°
D
92°
19

Triangle GHJ has the exterior angles shown below.For , what is the value of x?

Question illustration
A
2.7
B
5.8
C
12
D
29
20

Which choice includes two pairs of adjacent angles from the coordinate plane?

Question illustration
A
and , and
Option A
B
and , and
Option B
C
and , and
Option C
D
and , and
Option D

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