If you know the diameter and need the circumference you times the diameter of the circle by 3.14 also known as pie. That is how you get the circumference by only knowing the diameter. :)
Divide the known circumference by pi to find the diameter of the circle.
To Find Diameter:Multiply circumference by 0.3183, ordivide circumference by 3.1416Other things to do with circles:To find Circumference:Multiply diameter by 3.1416, ordivide diameter by 0.3183To Find Radius:Divide diameter by 2, ormultiply circumference by 0.15915, ordivide circumference by 6.28318
The equivalent of a "perimeter" in a circle is actually called its circumference. To get the diameter, just divide the circumference by pi.
By dividing the circumference by 2*pi will give you the radius and twice the radius gives you the diameter.
Divide the circumference by the value of Pi - that will give you the diameter.
Divide the circumference by 3.14159265 (3.14 for rough approximation) to find the diameter of a circle.
Circumference of a circle: pi times diameter
If you know the diameter and need the circumference you times the diameter of the circle by 3.14 also known as pie. That is how you get the circumference by only knowing the diameter. :)
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.
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.
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.
Diameter of a circle = circumference/pi
Divide the known circumference by pi to find the diameter of the circle.
circumference/pi = diameter
diameter*pi = circumference
Diameter = circumference/pi