How is circumference calculated

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.

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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.

Read on to learn:. As is the case with all of our tools, the circumference calculator works in all directions - it is also a circumference to diameter calculator, and can be used to convert circumference to radius, circumference to area, radius to circumference, radius to diameter duh!

If you want to draw a circle on the Cartesian plane, you might find this equation of a circle calculator useful. The circumference of a circle is the linear distance of a circle's edge.

It is the same as the perimeter of a geometric figure, but the term 'perimeter' is used exclusively for polygons. The following equation describes the relation between the circumference and the radius R of a circle:. A similarly simple formula determines the relationship between the area of a circle and its radius:. If you wish to calculate the properties of a three-dimensional solid, such as a sphere, cylinder or cone, it's best to use our volume calculator.

This proportion circumference to diameter is the definition of the constant pi. It is used in many areas, such as physics and mathematics. For example, you can find it in the centrifugal force calculator. The circumference of a circle is the linear distance of the circle's edge.

It is equivalent to the perimeter of a geometric shape, although that term perimeter is only used for polygons. The first person to calculate the Earth's circumference was Eratosthenes, a Greek mathematician , in B. He discovered that objects in a city on the Northern Tropic do not throw a shadow at noon on the summer solstice, but they do in a more northerly location. Knowing this, and the distance between the locations, he succeeded in calculating the Earth's circumference.

If you want to find the diameter from the circumference of a circle , follow these steps:. To find the radius from the circumference of a circle , you have to do the following:. To calculate the circumference of a circle with a radius of 1 meter , simply follow these steps:. To find the circumference of a cylinder , you have to be aware that a cylinder's cross-section is a circle.

If you know the cylinder's radius:. Let us understand this concept using an example. Consider a circular park as shown below. If a boy starts running from point 'A' and reaches the same point after taking one complete round of the park, a distance is covered by him.

This distance or boundary is called the circumference of the park which is in the shape of a circle. The circumference is the Length of the Boundary. The circumference of a circle refers to the measure of its boundary. If we open a circle and measure the boundary just like we measure a straight line, we get the circumference of the circle in terms of units of length like centimeters, meters, or kilometers.

These are the three most important elements of a circle. The circumference formula of a circle can be calculated using the radius 'r' of the circle and the value of ' pi '. While using this circumference formula, if we do not have the value of the radius, we can find it using the diameter.

Although the circumference of a circle is its length, it cannot be calculated with the help of a ruler scale like it is usually done for other polygons.

This is because a circle is a curved figure. 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. Pre-Algebra Introducing Algebra Overview Operations in the correct order Evaluate expressions Identify properties Equations with variables Coordinate system and ordered pairs Inequalities. Pre-Algebra Explore and understand integers Overview Absolute value Adding and subtracting integers Multiplying and dividing with integers.

Pre-Algebra Inequalities and one-step equations Overview Different ways to solve equations Calculating the area and the perimeter Solving inequalities Understanding inequalities and equations. Pre-Algebra Discover fractions and factors Overview Monomials and adding or subtracting polynomials Powers and exponents Multiplying polynomials and binomials Factorization and prime numbers Finding the greatest common factor Finding the least common multiple.