Enter the radius, diameter, circumference or area of a circle to find the other three. To find the area using the radius, or the length from the center of the circle to the edge, use the formula area = r^2, where r is the radius. Find a, c, r and d of a circle.
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Our tool works both ways no matter if you're. See how to calculate the area below, but first the calculator: Here, the greek letter represents the constant ratio of the circumference of any circle.
Given any 1 known variable of a circle,.
In geometry, the area enclosed by a circle of radius r is r2. The area of a circle calculator helps you compute the surface of a circle given a diameter or radius. Calculate the area, circumference, radius and diameter of circles.
