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The area of a circle is (pi x radius squared) A = πr2
The circumference is (pi x diameter) C = π (2r)
So if you have the circumference,
the area is the circumference squared, divided by 4pi (about 12.566). A = C2/4π
Example:
A circle with a diameter of 6 inches has a radius of 3 inches
Area A = pi (32) or about 28.27 square inches
Circumference C = pi (6) or about 18.85 inches
Using C2/4pi, the area is
18.85 x 18.85 / 12.566 = about 28.27 square inches
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Find the area of a circle when the circumference is 10in?
The area of a circle when the circumference is 10 inches is: 7.96 square inches.
How do i find circumference and area of a circle?
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
How do you find the diameter of a circle in the terms of pi?
To find the diameter of a circle, you will either need to know the area or its circumference. If you know the area: diameter = 2 x squareroot(area / Pi) If you know the circumference diameter = circumference / Pi
What is the radius and the area of a circle?
The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.
How do you calculate circumference and area of pi?
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius
