We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

GED Math : Radius and Diameter

Study concepts, example questions & explanations for GED Math

Create An Account

All GED Math Resources

4 Diagnostic Tests 263 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

← Previous 1 2 3 4 Next →

Example Question #31 : Geometry And Graphs

What is the radius of a circle if it has a circumference of 47.9 ?

Possible Answers:

8.9

7.6

9.3

8.3

9.4

Correct answer:

7.6

Explanation:

In order to solve this problem, it's important to understand the relationship between the two terms mentioned: radius and circumference.

The circumference of a circle can be solved for with the formula: $C= 2 \pi r$ , where r is radius. By substituting the circumference value into the equation, we should be able to solve for the radius fairly quickly.

$47.9=2 \pi r$

$\frac{47.9}{2 \pi}=r$

r = 7.6

Therefore, the radius of the circle is 7.6

Report an Error

Example Question #32 : Geometry And Graphs

If a circle has an area of 92.5 , what is its diameter?

Possible Answers:

10.8

10.6

8.1

9.9

6.2

Correct answer:

10.8

Explanation:

When it comes to circles, it's especially helpful to try and think about how things relate. This problem only provides the area of the circle, but it's asking for the diameter. How do these two things relate?

Well, the formula for area of a circle is given by: $A=\pi \cdot r^2$ , where r is the radius.

The diameter of a circle can be solved for via: $d= 2 \cdot r$ , where r is the radius.

Therefore, we see that two concepts are related through radius. This means that with the area, we can solve for radius. And then, we can use the radius to solve for the diameter.

$92.5= \pi r^2$

$\frac{92.5}{\pi}=r^2$

r=5.4

Now, we may solve for the diameter.

d= 2(5.4)

d=10.8

Therefore, the diameter of the circle is 10.8

Report an Error

Example Question #33 : Geometry And Graphs

Find the diameter of a circle that has an area of 57.7 .

Possible Answers:

19.2

8.6

7.7

6.9

26.4

Correct answer:

8.6

Explanation:

Well, the formula for area of a circle is given by: $A=\pi \cdot r^2$ , where r is the radius.

The diameter of a circle can be solved for via: $d= 2 \cdot r$ , where r is the radius.

Therefore, we see that two concepts are related through radius. This means that with the area, we can solve for radius. And then, we can use the radius to solve for the diameter.

$57.7= \pi r^2$

$\frac{57.7}{\pi}=r^2$

r=4.3

Now, we may solve for the diameter.

d= 2(4.3)

d=8.6

Therefore, the diameter of the circle is 8.6

Report an Error

Example Question #31 : Radius And Diameter

If a circle has an area of 119.8 , what is its diameter?

Possible Answers:

11.7

16.6

12.4

13.6

21.8

Correct answer:

12.4

Explanation:

Well, the formula for area of a circle is given by: $A=\pi \cdot r^2$ , where r is the radius.

The diameter of a circle can be solved for via: $d= 2 \cdot r$ , where r is the radius.

Therefore, we see that two concepts are related through radius. This means that with the area, we can solve for radius. And then, we can use the radius to solve for the diameter.

$119.8= \pi r^2$

$\frac{119.8}{\pi}=r^2$

r=6.2

Now, we may solve for the diameter.

d= 2(6.2)

d=12.4

Therefore, the diameter of the circle is 12.4

Report an Error

Example Question #31 : Circles

If a circle has an area of 64.8 , what is its radius?

Possible Answers:

3.5

4.5

5.2

1.7

6.3

Correct answer:

4.5

Explanation:

When it comes to circles, it's a great strategy to think about how concepts are related. In this problem the area is provided, but you are asked to solve for the area. But how are these two concepts related?

Well, area is solved for by: $A=\pi \cdot r^2$ , where r is the radius.

This means that we can directly solve for radius through substituting in the value for the area.

$64.8= \pi \cdot r^2$

$\frac{64.8}{\pi}= r^2$

Remember that you need to take the square root in order to solve for r.

r=4.5

Therefore, the radius is 4.5

Report an Error

Example Question #1001 : Ged Math

What is the radius of a circle if it has an area of 17.3 ?

Possible Answers:

3.1

2.2

2.3

2.7

4.5

Correct answer:

2.3

Explanation:

Well, area is solved for by: $A=\pi \cdot r^2$ , where r is the radius.

This means that we can directly solve for radius through substituting in the value for the area.

$17.3= \pi \cdot r^2$

$\frac{17.3}{\pi}= r^2$

Remember that you need to take the square root in order to solve for r.

r=2.3

Therefore, the radius is 2.3

Report an Error

Example Question #31 : Geometry And Graphs

Find the radius of a circle with an area of 76.9 .

Possible Answers:

12.7

4.9

5.5

9.4

1.2

Correct answer:

4.9

Explanation:

Well, area is solved for by: $A=\pi \cdot r^2$ , where r is the radius.

This means that we can directly solve for radius through substituting in the value for the area.

$76.9= \pi \cdot r^2$

$\frac{76.9}{\pi}= r^2$

Remember that you need to take the square root in order to solve for r.

r=4.9

Therefore, the radius is 4.9

Report an Error

Example Question #1003 : Ged Math

Your school as a circular lobby. If the distance around the outside of the lobby is $144\pi ft$ , what is the distance across the widest part of the floor?

Possible Answers:

d=120 ft

d=144 ft

d=72 ft

d=60 ft

Correct answer:

d=144 ft

Explanation:

Your school as a circular lobby. If the distance around the outside of the lobby is $144\pi ft$ , what is the distance across the widest part of the floor?

This question is asking us for diameter. We know this because we are told to find the distance across the widest part of a circular shape. The widest part of a circle will always go through the center, and assuming a straight line, will be its diameter.

To find the diameter, we can work backward from our circumference formula:

$C=2 \pi r$

Now, we know that

2r=d

So, we can rewrite our C formula to get:

$C=d\pi$

So, now we can solve for our diameter pretty easily!

$144 \pi ft=d\pi$

d=144 ft

So, our answer is:

d=144 ft

Report an Error

Example Question #31 : Circles

Use 3.14 for pi.

What is the radius of a circle with a circumference of 169.56 ft?

Possible Answers:

$27ft^{2}$

54ft

84.78ft

27ft

$54ft^{2}$

Correct answer:

27ft

Explanation:

First we need to recall that the formula for circumference of a circle is:

$C=D\cdot \pi$

Where is circumference and is diameter

We are given the circumference, and told to use 3.14 for pi, so we can plug these into our equation and solve for diameter

$169.56ft=D\cdot3.14$

we divide both sides by 3.14

$\frac{169.56ft}{3.14}=\frac{D\cdot 3.14}{3.14}$

54ft=D

Now that we have our diameter we need to divide it by 2 to find our radius

$\frac{54ft}{2}=radius$

27ft=r

Notice our answer is in ft because radius is linear

Report an Error

Example Question #31 : Radius And Diameter

What is the radius, in inches, of a circle with a diameter of 12 inches?

Possible Answers:

Correct answer:

Explanation:

The radius is half of the diameter:

D=2r

From here we plug in our diameter measure of 12 and solve for the radius:

12=2r

$\frac{12}{2}=r$

6=r

Report an Error

← Previous 1 2 3 4 Next →

View Tutors

Stephen
Certified Tutor

University of New Mexico-Main Campus, Bachelor in Arts, Philosophy and Religious Studies, General. Trinity International Univ...

View Tutors

Olga
Certified Tutor

Florida Atlantic University, Bachelor of Science, Biology, General.

View Tutors

Irma
Certified Tutor

Texas A & M University-Commerce, Bachelor of Science, Social Work. Texas A & M University-Commerce, Masters in Education, Edu...

All GED Math Resources

4 Diagnostic Tests 263 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

Computer Science Tutors in San Diego, Math Tutors in San Diego, Chemistry Tutors in San Francisco-Bay Area, GMAT Tutors in Philadelphia, French Tutors in Boston, Spanish Tutors in Seattle, Math Tutors in San Francisco-Bay Area, Biology Tutors in Denver, SAT Tutors in Houston, MCAT Tutors in Boston

Popular Courses & Classes

SAT Courses & Classes in Philadelphia, GRE Courses & Classes in Seattle, Spanish Courses & Classes in Boston, ISEE Courses & Classes in New York City, MCAT Courses & Classes in Atlanta, ACT Courses & Classes in Denver, ACT Courses & Classes in New York City, GRE Courses & Classes in Phoenix, Spanish Courses & Classes in Miami, LSAT Courses & Classes in Washington DC

Popular Test Prep

LSAT Test Prep in Seattle, MCAT Test Prep in Seattle, GMAT Test Prep in Washington DC, GMAT Test Prep in Miami, GRE Test Prep in Phoenix, SAT Test Prep in Philadelphia, MCAT Test Prep in Washington DC, ISEE Test Prep in Boston, GMAT Test Prep in Dallas Fort Worth, ACT Test Prep in Denver

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

GED Math : Radius and Diameter

Study concepts, example questions & explanations for GED Math

All GED Math Resources

Example Questions

Example Question #31 : Geometry And Graphs

Example Question #32 : Geometry And Graphs

Example Question #33 : Geometry And Graphs

Example Question #31 : Radius And Diameter

Example Question #31 : Circles

Example Question #1001 : Ged Math

Example Question #31 : Geometry And Graphs

Example Question #1003 : Ged Math

Example Question #31 : Circles

Example Question #31 : Radius And Diameter

All GED Math Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: