Can you find the perimeter of a circle

Perimeter is the distance around a closed figure and is typically measured in millimetres mm , centimetres cm , metres m and kilometres km. These units are related as follows:. The word 'perimeter' is also sometimes used instead of circumference. If we know the radius. Given the radius of a circle, the circumference or perimeter can be calculated using the formula bwloe:. If we know the diameter. If we know the diameter of a circle, the circumference can be found using the formula.

If we know the area. If we know the area of a circle, the circumference can be found using the formula:. Example A circular flower-bed has a radius of 9 m. Solution :. What Is the Perimeter of a Circle Formula?? Want to find complex math solutions within seconds? Use our free online calculator to solve challenging questions. With Cuemath, find solutions in simple and easy steps. Explore math program.

Explore coding program. Make your child naturally math minded. For example, if the given length of the diameter is 12 cm, your equation would be 3. The answer or circumference is Figure out the equation by plugging in the length for r in the equation, or double it for d in the equation.

For example, if the given length of the radius is 4 feet, your equation would be 3. The answer, or circumference, is Work backward with these formulas, if you know the length of the circumference. Divide the length of the circumference by Pi 3. Divide the diameter by 2 to find the radius. For example, if the length of the circumference of the circle is The length of the diameter is 5 inches.

Divide that by 2, and you find that the length of the radius is 2. Calculators can help you out when figuring the circumference, but it is better to exercise that brain muscle and work it out by hand.

Andrea Coventry has been writing online since Her expertise includes teaching, working with children and Montessori schools. Her work has appeared in various online publications. Coventry is certified by the American Montessori Society.

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