area of a circle = pi * radius² = 1 radius = √(1/pi)
circumference = 2pi * radius = 2pi * √(1/pi) = 3.5449077
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Divide the circumference by 2pi(3.14). That will give you the radius.Square the radius and multiply by piThat will give you the area.Calculate the radius by dividing the circumference by 2pi. Then square the radius and multiply by pi to get the area.
The circumference of a circle is the length around it.
Multiplying the diameter by pi (approx 3.1416) will give you the circumference of the circle.
Will give the circumference of half of the circle.
Divide the circumference by pi, and that will give you the diameter.