If that means = 36 then then the radius of the circle is 6 units
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Without an equality sign it can't be considered to be an equation but in general the equation of a circle whose centre is at (a, b) and radius is r is:- (x-a)^2+(y-b)^2 = r^2
I think you have missed out an equals sign. If you mean x2 + y2 = 16, then the radius is 4.
Radius = 1111
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.