The iterative process can be done like this: Iteration No. Example - Outside diameter of a bundle with 30 pc. Tip! - the calculator above can be used to approximate the outside diameter of a bundle of pipes by inserting the small pipe diameter and do an iterative changing of the outside pipe diameter until the number of pipes calculated fits the number of pipes in the bundle. Make a Shortcut to this Calculator on Your Home Screen?.Using this information we can calculate the circumference of the Earth as C = π x 12,742km = 40,030km. Given this information, what is the circumference of the Earth? Get out a piece of paper and a calculator and see if you can work it out on your own.Īgain, we know that C = πd, and that the diameter of the earth is 12,742km. Have you ever wondered how big the earth is? Well, using pi it’s possible to work out the circumference of the Earth! Scientists have discovered that the diameter of the Earth is 12,742km.
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How to calculate the circumference of the Earth With a little thinking we can easily figure out that, C = π x 4.3m = 13.51m (to 2 decimal places). Using the knowledge that the diameter is 4.3m on the diagram and knowing that C = πd, we can calculate the circumference. Example 3įind the missing length (marked with a ?) on the diagram below: Since the radius is 3m, we know that C = π x 6m = C= 18.84m (to 2 decimal places). If a circle has a radius of 3m, what is its circumference? Answer Since the diameter is 10cm, we know that C = π x 10cm = 31.42cm (to 2 decimal places). If a circle has a diameter of 10cm, what is its circumference? Answer If r is the radius of the circle, then d = 2r. Remember that the diameter is double the length of the radius.
You can also work out the circumference of a circle if you know its radius. This tells us that the circumference of the circle is three “and a bit” times as long as the diameter. The formula for working out the circumference of a circle is:Ĭircumference of circle = π x Diameter of circle To begin with, remember that pi is an irrational number written with the symbol π. If you know the diameter or radius of a circle, you can work out the circumference. How can you calculate the circumference of a circle? This diagram shows the circumference, diameter, center, and radius on a circle. You can also think of the radius as the distance between the center of the circle and its edge. The diameter will always pass through the center of the circle. The diameter is the distance from one side of the circle to the other at its widest points.
Given the radius or diameter and pi you can calculate the circumference. The radius, the diameter, and the circumference are the three defining aspects of every circle. There are two other important distances on a circle, the radius (r) and the diameter (d). This diagram shows the circumference of a circle. For shapes made of straight edges this line is called the perimeter but for circles this defining line is called the circumference. You can think of it as the line that defines the shape. It is like the perimeter of other shapes like squares. The circumference of a circle is the distance around the outside of the circle. How can you calculate the circumference of a circle?.In this article you will learn the answers to the following questions. Understanding what a circumference of a circle is and how to calculate it is crucial as you move to higher level math.
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