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C=2(3.14)r

This is circumference equation for circles. If you have the circumference, you need to input it into the equation and solve for r. r is the radius of the circle, so to determine the diameter, which is 2 times the length of the radius, you just need to multiply the number you got for r times 2.

Q: How do you find the diameter of a circle if you have the circumference?

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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

Divide the circumference by Pi to find the diameter.

In a circle, the circumference and diameter vary directly. Which of the following equations would allow you to find the diameter of a circle with a circumference of 154 if you know that in a second circle the diameter is 14 when the circumference is 44?

To get the circumference of a circle first you have to find the diameter of the circle and multiply the diameter by Pi (3.14 in short). so it is the diameter * Pi.

The diameter of a circle is directly proportionate to the circumference. You can find the diameter of a circle by dividing the circumference by the value of Pi (3.14) OR you can find the circumference by multiplying Pi by the diameter. it is a line that halves a circle

Multiply the diameter by Pi (about 3.1416). The result is the circle's circumference.

circumference of a circle = pi * diameter.

You cannot find the diameter of something from its circumference unless it is a circle and, in that case, diameter = circumference/pi