17
x2 + y2= 16
x2 + y2 = 36
The Radius
x2 + y2 = 9
The equation of circle is (x−h)^2+(y−k)^2 = r^2, where h,k is the center of circle and r is the radius of circle. so, according to question center is origin and radius is 10, therefore, equation of circle is x^2 + y^2 = 100
15 APEX =)
13 good luck
radius
radius
The circle of radius five centered at the origin.
x2 + y2 = r2 describes a circle, radius r, centred on the origin. r is thus sqrt(25 + 144) ie 13 units.
If that equals 16 then the radius is 4
x2 + y2 = 25
x2 + y2 = 25
x2 + y2= 16
x2 + y2 = 49
x2 + y2 = 36