How do you convert circumference to diameter?
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Q:

How do you convert circumference to diameter?

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Quick Answer

To calculate a circle's diameter from its circumference, one should divide the circumference by the constant pi, which is an irrational number approximately equal to 3.14159265358979.

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Full Answer

Circumference is defined as the distance around a circle; the diameter is the straight-line distance across the circle that touches two points on its border and goes through its center. The ratio of a circle's circumference to its diameter is the constant pi. In other words, circumference/diameter = pi, or circumference = pi * diameter. Therefore, the length of the diameter of a circle is equivalent to its circumference divided by pi.

Similarly, the length of a circle's radius, (the distance from the circle's center to any point on its border), is equivalent to its circumference divided by (2*pi). The radius is half as long as the diameter.

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Related Questions

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    Why is pi important?

    A:

    If the circumference or the area of a circle is known, pi can be used to find the diameter and the radius of that circle. Likewise, if the radius or diameter is known, pi can be used to find out the circumference or the area.

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  • Q:

    How do you measure the circumference of a circle?

    A:

    To measure the circumference of a circle, first measure the diameter and multiply that number by the mathematical constant pi. The diameter is a straight line that goes from one side of the circle to the other and passes through the center, and the value of pi is always 3.141592.

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    What is the formula for the circumference of a circle?

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    The formula for circumference of a circle is 2πr, where “r” is the radius of the circle and the value of π is approximately 22/7 or 3.14. The circumference of a circle is also called the perimeter of the circle.

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    How do you solve the lateral and surface area of a cylinder?

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    The lateral surface area of a cylinder is calculated by multiplying the circumference by the height using the formula 2(pi)(r)(h). The overall overall surface area is calculated by adding the area of each base to the lateral area using the formula 2(pi)(r)^2 + 2(pi)(r)(h).

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