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Because 2 times the radius is equal to the diameter of the circle

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Q: Why is the circumference of a circle diameter times pi or 2 radius times pi?
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What is the circumference of the circle with a 6 inches radius?

The circumference of a circle equals the diameter times pi. The diameter is two times the radius. So a circle with a radius of 6 would have a diameter of 12, and a circumference of 12pi.


What is the diameter and circumference of circle?

diameter=radius squared circumference=pi times diameter


How can you find the circumference of a circle with radius or diameter?

The circumference of a circle is equal to its diameter times pi. This is also equal to two times its radius times pi.


Is the circumference of a circle is two times the radius?

The circumference of a circle is 2*pi*radius or pi*diameter


What is the circumference of a circle with a radius of 67.5 meters?

The circumference of a circle it Pi times the diameter. The diameter is 2 times the radius. So the diameter is 135 and Pi is 3.1416. So the circumference is 424.115 metres.


How do you get the perimeter of circle?

The circumference of a circle is 3.14 times diameter. The diameter is 2 times the radius


What is the relationship between the Radius to the circumference?

The circumference is ALL the way around the circle, while the radius is only HALF way into the middle of the circle. I'm guessing you meant "What is the relationship between the radius of a circle and its circumference?" Radius is half of the diameter of a circle, circumference is PI times diameter; therefore, the circumference is PI times two times radius.


What is the circumference of a circle with the diameter of 16in?

Circumference of a circle is the diameter times pi or 2pi times the radius. Given the diameter, circumference = 16 times pi. So, the circumference is 16pi or 50.265


What is the circumference of a 3 inch circle?

circumference= pi(3.14) by the diameter. if your given the radius, double the radius and times by pi.


How do you calculate the diameter and the circumference of a circle?

Doubling the radius will give the diameter and times this by pi will give the circumference of the circle.


What is the relationship between radius diameter and circumferences of circles?

Radius is the distance from the center point to the edge of the circle. Diameter is the distance straight through the center point and across the circle. Circumference is the distance one full turn around the circle. Radius = 1/2 of the diameter Radius = (circumference) divided by (2 pi) Diameter = 2 times the radius Diameter = (circumference) divided by (pi) Circumference = (pi) times the diameter Circumference = (2 pi) times the radius


Given the circumference of a circle what is the radius?

Circumference equals the diameter times pi. The diameter is 2 times radius. Radius equals Circumference divided by pi then divided by 2.