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Q: What is equation for the circumference of a circle?

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The equation for the circumference of a circle is pi times radius squared.

Circumference ÷ Pi = Diameter

the equation for the circumference of a circle is 2*radius*pi, or since the radius is half of the diameter 2*radius=diameter, we can simplify the equation to the circumference of a circle=diameter*pi

circumference divided by pi (about 3.1416) = diameter

2x3.142xr

the circumference of a circle divided by its diameter

The equation for circumference is 2(3.14)(r) or 3.14(d) where r=radius and d=diameter. The radius of a circle is half of the circumference, or the distance across the interior of a circle.

The equation for determining the circumference of a circle is circumference = pi x diameter. So if the diameter is 5, then the circumference is pi * 5 = 15.71

Well the circumference equation is 2pi r and a semi-circle is half of a full circle so the circumference is 15.71 inches.

the equation for the circumference is Pi * double the radius which is 3.1416 * 15.5 * 2 The circumference of a circle with a radius of 15.5cm is 97.3cm.

Circumference ("perimeter") of a circle = (pi) x (diameter of the circle)

Area of a circle = 3.14 * r2 Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1 Circumference of circle = 2 * 3.14 * r Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ). In a nutshell, first find the radius and then the circumference.

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