If you know the circle's area then the radius can be found:
pi*radius2 = area
Divide both sides by pi:
radius2 = area/pi
Square root both sides:
radius = the square root of (area/pi)
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
radius is half the diameter of a circle.
To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.
Circumference of a circle = 2*pi*radius or diameter*pi
The diameter and the radius of a circle with a circumference of 62.8 meters are:d = 19.98mr = 9.99m
a protractor
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
The diameter and radius of a circle if the circumference is 37.68 are:Diameter = 11.99Radius = 5.997
radius is half the diameter of a circle.
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 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.
To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.
Circumference of a circle = 2*pi*radius or diameter*pi
The diameter of any circle is twice its radius.
If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi
The circumference of any circle is (pi) x (diameter),and of course, the diameter is double the radius.
The radius and diameter of a circle whose circumference is 25.12 are:r = 4d = 8