How can i calculate the circumference of a circle

How to find the circumference of a circle We'll do a three examples to help you learn how to find the circumference of a circle using the formulas we just learned. Question: Find the circumference of the following circle: Circles, radius, and circumference. What is the circumference of the circle given the radius. Circles, diameter, and circumference. Do better in math today Get Started Now.

Angles in a circle 2. Chord properties 3. Tangent properties 4. Circles and circumference 5. Arcs of a circle 6. Areas and sectors of circles 7. Central angles and proofs 8. Inscribed angles and proofs 9. Central and inscribed angles in circles Circle chord, tangent, and inscribed angles proofs Back to Course Index. Don't just watch, practice makes perfect. Terms related to circles Radius Diameter Circumference Central angle minor arc major arc Inscribed angle Chord perpendicular bisector Tangent point of tangency.

Find the circumferences of the following circles. Find the radius r. If DF is the diameter of circle C, find its length. Find the circumference of circle C. Find the circumference of the circle. The wheels of David's bicycle have a radius of 9 inches. How far has David traveled if the wheels have made revolutions?

Circles and circumference Don't just watch, practice makes perfect. Pi is a special mathematical constant with a value approximated to 3. Let us consider a practical illustration to understand how to calculate the circumference of a circle with the help of the circumference formula.

Illustration: The radius of the circle is 25 units find the circumference of the circle. Check out the below-listed articles related to the circumference of a circle and learn the basics.

Example 1: A garland woven with flowers needs to be stuck around a circular ring to decorate it. How long should the garland be so as to cover a ring of a radius of 28 cm?

To find the length of the garland, we have to find the circumference of the ring. Therefore, the length of the garland is cms. Example 2: The circumference of a wheel is cm. Find its radius and diameter. Let the radius of the circle be R. Therefore, the radius is 70cm, and the diameter is cm. Example 3: The perimeter of a rectangular wire is m. The same wire is bent into the shape of a circle. Find the radius of the circle formed using the circumference formula.

Therefore the Radius is 42m. Example 4: Tom runs three rounds at a circular stadium field every day before starting his cricket practice.

The diameter of the field is 28 m. How much does he run around the field every day? Since Tom runs around the circular field, we need to find the circumference of the field. Hence, the circumference of the field is 88 m. We know that Tom runs around the field thrice. Hence, we multiply the circumference by 3.

Therefore, Tom runs meters. The circumference of a circle is a linear quantity that has the same units of length. The circumference of a circle is calculated with the help of a circumference formula that needs the value of the radius and Pi. The answer depends on your number. For example, pie or 3. Include your email address to get a message when this question is answered. By using this service, some information may be shared with YouTube.

Helpful 13 Not Helpful 8. 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. Thanks to all authors for creating a page that has been read 9,, times. Did this article help you? Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy. About This Article. By signing up you are agreeing to receive emails according to our privacy policy.