Circumference of a circle
The circumference of a circle is the distance around the outside edge of the circle
The circumference of a circle is the distance around the outside edge of the circle. It is given by the formula:
C = 2πr
where C represents the circumference and r represents the radius of the circle.
To find the circumference of a circle, you need to know either the radius or the diameter. The radius is the distance from the center of the circle to any point on the edge, while the diameter is the distance across the circle passing through the center.
If you know the radius, you can simply plug it into the formula and calculate the circumference. For example, if the radius is 5 units, the formula becomes:
C = 2π(5) = 10π
So, the circumference would be 10π units.
If you know the diameter, you can use it to calculate the radius first by dividing the diameter by 2. Then, use the formula with the calculated radius. For example, if the diameter is 10 units, the radius would be 10/2 = 5 units. Plugging this into the formula gives:
C = 2π(5) = 10π
Again, the circumference would be 10π units.
Note that π is a mathematical constant approximately equal to 3.14159, but it is best to use a calculator or software that provides a more accurate value for π in your calculations.
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