![]() This is the total length of the edge around the circle with the specified diameter, if it was straightened out. We can see this on the graphic below: You can also work out the circumference of a circle if you know its radius. This tells us that the circumference of the circle is three and a bit times as long as the diameter. C × 2r, where r is the radius and the diameter is twice the radius. C × d, where (pi) 22/7 or 3.14 (approx), d is the diameter. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart. The formula for working out the circumference of a circle is: Circumference of circle x Diameter of circle. The formula for circumference is expressed using the radius r, d (diameter), and. ![]() The formula used to calculate circle circumference is:Įnter the diameter of a circle. Circles are all similar, and the circumference divided by the diameter produces the same value regardless of their radius. The circumference can also be calculated by multiplying 2×radius. This tool will calculate the circumference of a circle from the diameter, and will convert different measurement units for diameter and circumference. To calculate the circumference of a circle, multiply the diameter of the circle with (pi). Sphere diameter to surface area calculator Remember the circumference and area of a circle formula The circumference of a circle ×diameter The area of a circle ×radius×radius Or ×radius2 ×.Sphere volume calculator using diameter. ![]()
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