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d * pi

or 2 * r * pi

Where d is diameter and r is radius and pi = 3.14159

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12y ago

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How do you find the of a circumference of circle in math?

the formula is: circumference= p*diameter


Whats the radius of a circle with circumference 30 cm?

To find the radius of a circle with a circumference of 30 cm, we can use the formula for the circumference of a circle: C = 2πr, where C is the circumference and r is the radius. Given C = 30 cm, we can plug this value into the formula and solve for r. 30 = 2πr r = 30 / (2π) r ≈ 4.77 cm Therefore, the radius of the circle is approximately 4.77 cm.


What is circumference of a circle with 154 square inches?

Use the standard formula for the area of a circle to find out the circle's radius. Then multiply that by 2 x pi, to get the circumference.


If the diameter of the circle is 69mm then what is the circumference of this circle?

To find the circumference of a circle, you can use the formula C = πd, where C is the circumference, π is a constant approximately equal to 3.14159, and d is the diameter of the circle. Given that the diameter of the circle is 69mm, you can substitute this value into the formula: C = π * 69mm ≈ 216.769mm. Therefore, the circumference of the circle is approximately 216.769mm.


What is the radius and the area of a circle?

The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.

Related Questions

How do find the circumference of a circle?

The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.


If the area of a circle is 201.06 then the circumference of the circle is?

The formula to find the circumference of a circle is C = 2πr, where r is the radius of the circle. To find the circumference, you first need to find the radius by using the formula for the area of a circle (A = πr^2). Given that the area is 201.06, you can solve for the radius. Once you have the radius, you can plug it into the formula C = 2πr to find the circumference.


How do you find the formula for the circumference of a circle?

Circle's circumference = 2*pi*radius or diameter*pi


How do you find the of a circumference of circle in math?

the formula is: circumference= p*diameter


How do you answer the formula of a circumference?

to find the circumference of a circle you do 2 times3.14timesthe radius


What formula do you use if you know the diameter of a circle and want to find the circumference?

circumference of a circle = pi * diameter.


What is the formula to find circumference when you are given the radius?

To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi


Who discovered the formula of how to find out the circumference of a circle?

Archimedes


What is the formula to find the circumference of a circle with the raduis given?

Circumference of a circle: 2 x pi x radius.


What is the formula to find the circumference of a circle with the diameter given?

Circumference = (diameter) multiplied by (pi)


What is the circumference of a circle with a diameter of 18 in.?

The circumference of a circle with a diameter of 18 inches is 56.5 inches.


Whats the radius of a circle with circumference 30 cm?

To find the radius of a circle with a circumference of 30 cm, we can use the formula for the circumference of a circle: C = 2πr, where C is the circumference and r is the radius. Given C = 30 cm, we can plug this value into the formula and solve for r. 30 = 2πr r = 30 / (2π) r ≈ 4.77 cm Therefore, the radius of the circle is approximately 4.77 cm.