Question

Find the length of the radius for this circle.(x - 3)² (y - 5)² = 8

Answer 1

$(x-a)^{2} + (y-b)^{2} = r^{2}$
Thus the radius of the circle is the square root of 8,
r=$\sqrt{8}$
r= 2.83

Answer 2

The standard formula of circle is x^2 +y^2 = r^2 

hope this will help you getting the length of radius sure right easy 

r = sqrt8 = 2sqrt2 

hope this will help you