The standard equation of a circle, with center in (a,b) and radius r, is:
(x-a)2 + (y-b)2 = r2
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(x - A)2 + (y - B)2 = R2 The center of the circle is the point (A, B) . The circle's radius is ' R '.
depends on the equation.
Standard equation for a circle centred at the origin is x2 + y2 = r2 where r is the radius of the circle. If you increase the size of the circle then the radius must increase, so r2 will be larger. eg a circle of radius 2 has the equation x2 + y2 = 4, if the radius increases to 3 then the equation becomes x2 + y2 = 9
Center of circle: (6, 8) Radius of circle: 3
this is impossible