The circumference of a circle is the distance around the outskirts of the circle. Knowing the radius of any circle allows one to calculate its circumference. More »

To calculate the circumference of a circle, multiply the diameter of the circle in question by pi. You need to know the diameter of the circle to complete this task. More »

Find the circumference of a circle using the formula 2 x π x r. You need the value of π, or pi, and the radius of the circle. More »

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To calculate the diameter of a circle, multiply the radius of the circle by 2. Diameter is the measure of the length of a straight line that passes through the center of a circle, touching the circumference or surface at... More »

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To find the perimeter of a circle, also known as the circumference, plug the dimensions of the circle into the formula ((pi)(d). This formula stands for pi (approximately 22/7) times the diameter of the circle (d). More »

Find the diameter of a circle with a given circumference by solving for the formula "d=C/pi," where d is the diameter, C is the circumference and pi is 3.1459. For this problem, find the diameter of a circle that has a c... More »

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. More »

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