# Circumference Of A Circle Flashcards, test questions and answers

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## What is Circumference Of A Circle?

The circumference of a circle is the distance around the outside of a circle. It is also known as the perimeter of a circle. To calculate the circumference of a circle, you need to know its radiusthe distance from its center to its outer edge. The formula for calculating the circumference of a circle is represents the radius of the circle and ðœ‹ (pi) is equal to 3.141592653589793238462643.For example, if you have a circle with a radius of 5 cm, then its circumference would be calculated as follows: — 3.141592653589793238462643 Ã— 5 cm = 31.4159265358979 cm. This means that when you measure around this particular circle it will have an approximate length of 31 centimeters.Circumference can be used in many practical applications such as determining how much material to purchase when building something circular like an above-ground swimming pool or fence posts for your backyard boundary line; or even measuring distances between points on maps and globes. It’s also used in mathematics for more advanced concepts such as finding arc lengths, angles in circles and sectors, and areas enclosed by circlesall important topics in trigonometry and calculus classes.