How do you find the equation of the circle given r=4; C(3,-4)?
The standard form of the equation of a circle is.
where (a ,b) are the coordinates of the centre and r, the radius.
here a = 3 , b = -4 and r = 4
Substitute these values into the standard equation.
#(x-3)^2+(y+4)^2=16" is the equation"#