Circle-identify Radius And Diameter.

Approved & Edited by ProProfs Editorial Team

The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.

Learn about Our Editorial Process

| By Mmmmssssin

Mmmmssssin

Community Contributor

Quizzes Created: 1 | Total Attempts: 8,019

Questions: 16 | Attempts: 8,210 | Updated: Apr 21, 2024

Questions

Settings

Create your own Quiz

Share on Facebook Share on Twitter Share on Whatsapp Share on Pinterest Share on Email Copy to Clipboard Embed on your website

Questions and Answers

1.

What is the name of the circle?
- A.
  
  A
- B.
  
  B
- C.
  
  AA
Correct Answer
A. A

Explanation
The correct answer is A because it is the only option provided that is a single letter and does not have any additional characters or repetitions.

Rate this question:

13
0
2.

What is the diameter of the following circle?
- A.
  
  2
- B.
  
  4
- C.
  
  5
Correct Answer
B. 4

Explanation
The diameter of a circle is a line segment that passes through the center of the circle and connects two points on the circumference. In this case, the only option that represents a possible diameter is 4.

Rate this question:

16
1
3.

What is the diameter of the following circle?
- A.
  
  6
- B.
  
  5
- C.
  
  3
Correct Answer
A. 6

Explanation
The diameter of a circle is a line segment that passes through the center of the circle and connects two points on the circumference. In this case, the given answer of 6 suggests that the circle has a diameter of 6 units.

Rate this question:

14
0
4.

What is the radius of the following circle?
- A.
  
  8
- B.
  
  6
- C.
  
  4
Correct Answer
C. 4

Explanation
The radius of a circle is the distance from the center of the circle to any point on its circumference. In this case, the given answer of 4 indicates that the radius of the circle is 4 units.

Rate this question:

13
0
5.

What is the radius of the circle?
- A.
  
  10
- B.
  
  14
- C.
  
  7
Correct Answer
C. 7

Explanation
The correct answer is 7 because the radius of a circle is the distance from the center of the circle to any point on its circumference. Since 7 is the only option that represents a possible radius, it must be the correct answer.

Rate this question:

10
0
6.

What is the diameter of a circle with a radius of 10?
- A.
  
  15
- B.
  
  20
- C.
  
  10
Correct Answer
B. 20

Explanation
The diameter of a circle is always twice the length of its radius. Since the radius of this circle is given as 10, the diameter will be 2 times 10, which equals 20.

Rate this question:

13
0
7.

The diameter of a circle is twice as long as the radius.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The statement is true because the diameter of a circle is always equal to twice the length of its radius. This relationship is constant for all circles, regardless of their size. Therefore, it can be concluded that the diameter is indeed twice as long as the radius.

Rate this question:

19
1
8.

The diameter of a circle goes through the center of the circle.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The diameter of a circle is a line segment that passes through the center of the circle and is twice the length of the radius. It divides the circle into two equal halves, and any point on the diameter is equidistant from the endpoints of the diameter. Therefore, the statement that the diameter of a circle goes through the center of the circle is true.

Rate this question:

12
1
9.

What is the diameter of a circle with a radius of 15?
- A.
  
  30
- B.
  
  20
- C.
  
  10
Correct Answer
A. 30

Explanation
The diameter of a circle is twice the length of its radius. Since the radius of the given circle is 15 units, the diameter would be 2 times 15, which equals 30 units.

Rate this question:

13
1
10.

What is the radius of a circle with a diameter of 20?
- A.
  
  7
- B.
  
  10
- C.
  
  12
Correct Answer
B. 10

Explanation
The radius of a circle is half of its diameter. Since the diameter of the circle is given as 20, the radius would be half of 20, which is 10.

Rate this question:

16
0
11.

What is the diameter of a circle with a radius of 12?
- A.
  
  10
- B.
  
  22
- C.
  
  24
Correct Answer
C. 24

Explanation
The diameter of a circle is twice the length of its radius. Therefore, if the radius of the circle is 12, the diameter would be 24.

Rate this question:

14
0
12.

What is the diameter of a circle with a radius of 32?
- A.
  
  64
- B.
  
  45
- C.
  
  67
Correct Answer
A. 64

Explanation
The diameter of a circle is twice the length of its radius. Therefore, if the radius of the circle is 32, the diameter would be 2 times 32, which equals 64.

Rate this question:

11
0
13.

What is the diameter of a circle with a radius of 16?
- A.
  
  20
- B.
  
  32
- C.
  
  8
Correct Answer
B. 32

Explanation
The diameter of a circle is equal to twice the radius. Therefore, if the radius of the circle is 16, the diameter would be 2 times 16, which is equal to 32.

Rate this question:

14
0
14.

What is the radius of a circle with a diameter 40?
- A.
  
  15
- B.
  
  18
- C.
  
  20
Correct Answer
C. 20

Explanation
The radius of a circle is half of its diameter. Given that the diameter is 40, we can calculate the radius by dividing the diameter by 2. Therefore, the radius of the circle is 20.

Rate this question:

36
0
15.

What is the radius of a circle with a diameter 18?
- A.
  
  7
- B.
  
  9
- C.
  
  3
Correct Answer
B. 9

Explanation
The radius of a circle is half of its diameter. In this case, the diameter is given as 18. Therefore, the radius would be half of 18, which is 9.

Rate this question:

20
0
16.

What is the diameter of the figure?
- A.
  
  7
- B.
  
  9
- C.
  
  8
- D.
  
  6
Correct Answer
C. 8

Explanation
The diameter of a circle is twice the length of its radius. Given a radius of 4 cm, you can calculate the diameter by multiplying the radius by 2:
Diameter=2×radius=2×4 cm=8 cm
Thus, the diameter of a circle with a 4 cm radius is 8 cm. The correct answer is B. 8 cm.

Rate this question:

13
0