It is 1/2 of the diameter, and 1/(2 pi) times the circumference,
of the same circle.
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The standard equation of a circle, with center in (a,b) and radius r, is: (x-a)2 + (y-b)2 = r2
For a circle with center at (a,b), and radius r: (x-a)2 + (y-b)2 = r2
(x - a)2 + (y - b)2 = c2The center of the circle is located at the point (a, b).The radius of the circle is 'c' .
(x - A)2 + (y - B)2 = R2 The center of the circle is the point (A, B) . The circle's radius is ' R '.
B.50.27