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Q: How do you find the circumference of a circle if the diamter is 40cm?

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The circumference is equal to pi times the diameter. To find the diamter take the circumference and divide by pi. Pi = 3.14

In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.

The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.

find the radius of a circle with circumference of 42.1

The circumference of a circle is the length of the circle's perimeter.

Diameter of a circle = circumference/pi

circumference of a circle = 2piradiuis or diameter*pi

If you know the circumference of a circle, you can find the radius by dividing the circumference by the value of Pi (3.14159...)

When the shape is a circle, then the perimeter is called"circumference".The circumference IS the perimeter of a circle.

To find the circumference of a circle in rhombus you eat SH*t .

Divide the known circumference by pi to find the diameter of the circle.

to find the circumference of any circle, times the diameter(d) by pi and you will get the answers.

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