Question: Find the circumference of the following circle:. Once again in this example, we're given the radius of the circle. Although it's not a clean number like our previous example, but we can still simply plug the number directly into the formula like what we did above. Be aware of the units that this circle's radius is given in and remember to give your final answer in the same unit.
In this question, we find that the circumference is equalled to In this example, we aren't given the radius. We're given the distance across a circle through its center, which is also called the diameter of a circle. When we substitute "d" with 17, we find that we'll get the answer of An interesting point to note is that you can still use the other formula for finding the circumference that uses the radius.
All we have to do is first change the diameter into a radius. We know that the diameter is 2 times the radius, so therefore, we can divide 17 by 2 to find the radius of 8. Generally, it's easier to use whichever formula corresponds with the characteristics of the circle you are given. However, if you're unable to remember both of the formulas, you can always manipulate the info you're given so that it fits into the formula you do remember.
Feel free to play around with this online circle calculator to see how the circumference changes as the diameter and radius changes. Back to Course Index. You can still navigate around the site and check out our free content, but some functionality, such as sign up, will not work. If you do have javascript enabled there may have been a loading error; try refreshing your browser. Home Geometry Circles. If you know the cylinder's radius: Multiply the radius by 2 to get the diameter.
That's it; you found the circumference of the cylinder. The result is the cylinder's circumference. How do I find the area of a circle with a circumference of 1 meter? This is the circle's diameter , in this case, Divide by 2. This result is the circle's radius of That's it; a circle with a circumference of 1 meter has an area of How to find the radius of a circle with a circumference of 10 centimeters? The result is the circle's diameter, 3. And there you go, the radius of a circle with a circumference of 10 centimeters is 1.
What is the unit of the circumference of a circle? Bogna Szyk and Mateusz Mucha. Radius r. Circumference c. Arc length Area Area of a circle … 40 more. People also viewed…. Alien Civilization Calculator.
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Find the Best Tutors Do not fill in this field. Your Full Name. Phone Number. Zip Code. Track your scores, create tests, and take your learning to the next level! Remember: some worksheets will ask to replace pi with a subside, such as 3. Helpful 9 Not Helpful 6. To find circumference from the diameter, just multiply pi by the diameter. Helpful 9 Not Helpful 7. The radius is always going to be half of the diameter. Helpful 1 Not Helpful 0.
Submit a Tip All tip submissions are carefully reviewed before being published. Take your time. Remember the old adage—measure twice, cut once. Helpful 5 Not Helpful 7. Helpful 5 Not Helpful 8. Remember to always double-check your work because one mistake will set off all your data. Related wikiHows How to. How to. Co-authors: Updated: October 22, Categories: Featured Articles Geometry.
Italiano: Calcolare la Circonferenza di un Cerchio. Deutsch: Einen Kreisumfang berechnen. Nederlands: De omtrek van een cirkel berekenen. Bahasa Indonesia: Menghitung Keliling Lingkaran.
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