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Knowing how to calculate circumference is used in many fields of study, including: If you have trouble remembering geometry terms, it helps to think of other words from the same root with which you may be more familiar. For example, the Latin root of the word circumference is circum, meaning around.

Circum is now considered a prefix also meaning around or round about. Check out 4 common types of geometry homework problems and solutions involving the circumference of circles. What is the radius of a circle with a circumference of ft.? Find the circumference of a circle that has an area of This is a two-step problem. First, since we know the area of the circle we can figure out the radius of the circle by plugging in Now that we know the radius is equal to 5 m.

If you still need help with other geometry problems about the circumference of a circle , please ask in the comment section below. Sign in or sign up and post using a HubPages Network account. Comments are not for promoting your articles or other sites. LOL, my daughter the smarter one figured that out. Dd is doing fairly OK in geometry this semester, but last semester algebra most of her homework sessions ended in tears. She got a 45 on an algebra assignment that she, my husband and I all worked on together for three hours.

We will need you again for sure! You are very welcome SmartandFun. Although looking back over my answer, somehow my pi symbol was replaced with a question mark. I am glad you could follow along. Thank you so much, KTrapp, you are a life saver! I was able to go over your answer with my daughter this morning before school, and we both get it now! She and I are both "arts and letters" type people and have a hard time with math. I feel terrible when she asks me for help.

I try to help but truthfully she is ahead of me in the math dept. I see those symbols and letters like the m and my brain just freezes up.

Thanks so much for helping us both! Smartandfun - Thanks for your question. I think I can help both you and your daughter. The Area of anything circle, square, triangle, etc. For example, a square where each side is 2inches has a perimeter distance around of 8inches and an area of 4inches squared. In example 4 the "m" simply represents the units i. It is "m squared" since the What we know is that the Area of the circle is If you look at the equations for the Area of a circle and the Circumference of a circle, they both have r radius in them.

So if we could figure out the radius of the circle knowing the Area, then we could plug the radius of the circle into the Circumference equation in order to find the circumference.

Now that we know the radius of the circle is 8 units we can substitute 8 for r into the circumference equation as follows:. Therefore, a circle with an Area of The example you give has an area of What do we do if the area in her question is not m or squared? What does the m stand for? The area in her question is How does that plug into the formula? I do not get it at all! Fizzywoz - If you look at examples 1- 4 at the end of the article you can see how numbers are plugged into the equation.

You will usually just plug in a known radius into the equation to figure out the circumference or you may plug in a known circumference to determine the radius. Let me know if you have any other questions. I appreciate your feedback. They probably never were going to need that exact math, but the value for most kids is in the exercise it gives their brains.

Most colleges like to see years of high school math so most kids have no choice but to find their way through it. No skating allowed anymore. But in California, you have to pass English and math to graduate. I would have flunked the math for sure! I think this is what makes frustrated math students ask, "when am I ever going to need this?

A good attitude, as you put it, definitely helps when learning math. I think sometimes the pace in high school is too fast for some kids, especially when it is their first time ever learning some of these concepts. Of all math forms, geometry is the one that I have found most useful in my everyday life.

These are little skills that we need to be reminded of from time to time. It also helps that I understand the importance of math and have a better attitude towards it now than I did when I was in high school! Voted up and useful. Other product and company names shown may be trademarks of their respective owners.

The circumference of a circle is the distance around the circle. C = π (2r) = 2 πr. The area is the number of square units inside the circle. A = πd2/4.

Homework: Radius, Diameter, and Circumference of circles. Homework: Area of Circles. 5. Find the perimeter of the semicircle. Let Tt 17 in 4. Consider the diagram of a semicircle shown. b. c. Explain in words how to determine the perimeter of a semicircle.

Radius, Diameter, and Circumference. Download Yup and get help from an expert math tutor 24/7. Share this: Click to share on Twitter (Opens in new window) Click to share on Facebook (Opens in new window) Click to share on Google+ (Opens in new window) Powered by waphot.ga Post to. A circle is a curve joining a set of points which are at same distance from a fixed point. Here, the fixed point is called the center of the circle and the fixed distance is called the radius of the circle.

Sep 04, · Physics Forums | Science Articles, Homework Help, Discussion. Forums > Homework Help > Introductory Physics Homework > Limited time only! Circumference of Earth With Eratosthenes You are trying to determine the circumference of a circle, not figure out the sides of a triangle.) SteamKing, Sep 4. Feb 07, · The circumference = Find the radius. Can someone explain to me how to do this in detail please. I know the basic concept of the circumference = 2 π R but I'm not sure how to go backwards from the circumference back to the radius. Any help would be appreciated and 10 pts will be awarded to the best answer. Thanks in waphot.ga: Resolved.