AnswersFL-1205040-MJ Grade 7 Mathematics B -GFCircumference

Circumference — Unit test Answers

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Which set of three angles could represent the interior angles of a triangle?

A
19 degrees, 70 degrees, 91 degrees
Option A
B
47 degrees, 12 degrees, 31 degrees
Option B
C
50 degrees, 20 degrees, 20 degrees
Option C
D
25 degrees, 25 degrees, 100 degrees
Option D
2
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Tinh has a triangle with side lengths 12 mm, 15 mm, and 18 mm. He wants to reduce the triangle by one-third, so he divides each side length and each angle measure by 3. Which describes Tinh’s reduction?

A
Tinh’s reduction is incorrect; he should have only divided the side lengths by 3.
B
Tinh’s reduction is incorrect; he should have only divided the angle measures by 3.
C
Tinh’s reduction is incorrect; he should have multiplied the side lengths by 3 instead.
D
Tinh’s reduction is incorrect; he should have multiplied the angle measures by 3 instead.
3

What is the measure of ?

Question illustration
A
50 degrees
Option A
B
80 degrees
Option B
C
100 degrees
Option C
D
130 degrees
Option D
4

What is the radius of this circle if the circumference is cm? cm

Question illustration
A
3 cm
B
9 cm
C
18 cm
D
36 cm
5

What is the measure of SRT?

Question illustration
A
69 degrees
Option A
B
79 degrees
Option B
C
99 degrees
Option C
D
101 degrees
Option D
6

What is the measure of ?

Question illustration
A
41°
B
49°
C
51°
D
61°
7

Which angle is complementary to ?

Question illustration
A
Angle A O B
Option A
B
Angle A O E
Option B
C
Angle B O C
Option C
D
Angle A O C
Option D
8

What is the circumference of the circle? Use for .

Question illustration
A
44 cm
B
55 cm
C
100 cm
D
110 cm
9

A road bike has a wheel diameter of 622 mm. What is the circumference of the wheel? Use 3.14 for .

Question illustration
A
976.24 mm
B
976.54 mm
C
1,852.08 mm
D
1,953.08 mm
10

What is the value of x in triangle PQR below?

Question illustration
A
86 degrees
Option A
B
94 degrees
Option B
C
132 degrees
Option C
D
142 degrees
Option D
11

Which set of three angles could represent the interior angles of a triangle?

A
49 degrees, 59 degrees, 72 degrees
Option A
B
34 degrees, 45 degrees, 11 degrees
Option B
C
24 degrees, 51 degrees, 15 degrees
Option C
D
45 degrees, 70 degrees, 85 degrees
Option D
12

The diameter of a circle is 4 cm. Which equation can be used to find its circumference?

A
C = pi times 2
Option A
B
C = pi times 4
Option B
C
C = StartFraction pi times 4 over 2 EndFraction
Option C
D
C = StartFraction pi times 4 over 4 EndFraction
Option D
13

Two angles in a triangle measure and . What is the measure of the third angle?

Question illustration
A
35 degrees
Option A
B
55 degrees
Option B
C
145 degrees
Option C
D
215 degrees
Option D
14

Two lengths of a triangle are shown. Which could be the length of ?

Question illustration
A
11 ft
B
13 ft
C
15 ft
D
18 ft
15

Which statement is true about ?

Question illustration
A
It is supplementary to .
Option A
B
It is complementary to .
Option B
C
It is congruent to .
Option C
D
It is linear to .
Option D
16

Which angle is adjacent to ?

Question illustration
A
Angle A F B
Option A
B
Angle A F C
Option B
C
Angle B F D
Option C
D
Angle B F C
Option D
17

John is putting a fence around his garden that is shaped like a half circle and a rectangle. How much fencing will John need? Use for .

Question illustration
A
32 ft
B
39 ft
C
46 ft
D
57 ft
18

In isosceles triangle ABC below, what is the value of x?

Question illustration
A
28 degrees
Option A
B
76 degrees
Option B
C
122 degrees
Option C
D
152 degrees
Option D
19

A circular swimming pool has a radius of 28 ft. There is a path all the way around the pool that is 4 ft wide. A fence is going to be built around the outside edge of the pool path. About how many feet of fencing are needed to go around the pool path? Use 3.14 for .

Question illustration
A
88 ft
B
100 ft
C
176 ft
D
201 ft
20

Line AOB is a straight line. Which statements are true about the angles in the figure? Select three options.

Question illustration
A
and are complementary angles.
Option A
B
and are supplementary angles.
Option B
C
and are adjacent angles.
Option C
D
and are vertical angles.
Option D
E
and are a linear pair of angles.
Option E

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