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

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

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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.

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

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

Yes it is. Circumference is the whole area of the circle. Radius is from the middle to the side of the circle. Yes it is. The radius it half way across the circle from the center, while the circumference is all the way around the circle. The diameter is all the way across the circle, while being twice the radius. The circumference is about 3.14 times the diameter (or Pi if you prefer).

divide the diameter of 25.6 by 2 to find the radius. The radius is 12.8. The formula to find the circumference is radius squared times pi. 12.8 squared is 163.84 and multiplied by pi is 514.7.. So Circumference = 514.7 The above computation gives the AREA of the circle, not the CIRCUMFERENCE. The CIRCUMFERENCE is 2 times the radius times pi, or the diameter times pi.

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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.

diameter=radius squared circumference=pi times diameter

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

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

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.

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

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.

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

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

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

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

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