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circumference: Pi(3.14) x radius squared

Diameter: radius squared

radius: diameter divided by 2

Q: What are the formulas for finding the circumference diameter and radius?

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The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.

Radius is 1/2 of a diameter. 2.5/2 is 1.25. Radius is necessary in finding the circumference and area of a circle.

It depends on what information you have: radius, diameter, area, etc.

Diameter = radius * 2 Circumference = pi * diameter.

They are: 2*pi*radius or as diameter*pi

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The unit for a circumference is the same as the unit for length (or radius or diameter).

The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.

Radius is 1/2 of a diameter. 2.5/2 is 1.25. Radius is necessary in finding the circumference and area of a circle.

When you are using mathematical formulas, it is good to know the difference. For example finding the circumference or area of a circle.

If you have the circumference: circumference = (pi) * diameter diameter = circumference / (pi) If you have the area: area = (pi) * radius * radius radius = square_root(area / pi) radius = diameter / 2 diameter = 2 * square_root(area / pi)

It depends on what information you have: radius, diameter, area, etc.

Okay finding circumference from knowing the radius right? The radius is equal to half the diameter and circumference is equal to pi * diameter. So double the radius and multiply it by 3.14 then you will get the circumference!

The formula for finding the circumference is C = Pi x D, where Pi = 3.1416 and D is the diameter. The Radius is one-half of the diameter., So, multiply the radius by 2 and then multiply by Pi.

Diameter = radius * 2 Circumference = pi * diameter.

They are: 2*pi*radius or as diameter*pi

circumference of a circle = 2*pi*radius or pi*diameter

1/2 diameter or the circumference/pi/2