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find the radius of a circle with circumference of 42.1

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Using the circumference, you would find the radius first. The circumference C = 2*Pi*r where r is the radius. Then, the area of the circle = Pi*r^2.

For a circle, circumference = 2 x pi x radius.

Circumference of a circle = 2*pi*radius

The radius of a circle is the distance from its centre to its circumference. If a circle has a radius of r units then the length of its circumference is 2*pi*r units.

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

Circumference = 2*pi*radius So the radius = circumference/2*pi

Circumference of a circle = 2*pi*radius Circumference = 2*pi*5.6 = 35.18583772 units

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

Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared

Circumference = 2 x pi x radius = 31.4159

Circumference of a circle = 2*pi*radius = 8*pi or 25.13274123 units

The circumference of a circle with a radius of 5 centimeters 157.0796...The area of a circle with a radius of a 5 centimeters is 78.5398...

To find the circumference of a circle then multiply pi (3.14159265...) by the diameter of the circle. To find the area then multiply pi by the radius squared.

To find the circumference of a circle, use the equation: Circumference = 2*π*radius so when the radius is r, the circumference is 2πr

If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.

The circumference of a circle is equal to the radius times 2*pi. 2*pi*R where R is the radius.

If you know the circumference of a circle, you can find the radius by dividing the circumference by the value of Pi (3.14159...)

Circumference = 2*pi*r

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

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

The circumference of a circle that has a radius of 5 inches is 10 X pi or approximatly 31.415926535897932384626433832795. If you know the radius you can find the circumference by multiplying it by 2(pi)

circumference = 2 x π x radius ⇒ radius = circumference ÷ (2π) = 24π ÷ 2π = 12 units.

Diameter of a circle = 2*radius Circumference of a circle = 2*radius*pi

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

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