Question

What is the radius?

Find the length of the radius of the circle with an equation of
(x + 3)2 + (y-7)2 = 289.

Answer 1

Radius = 17.

Explanation:

If(h,k) is centre and rradius, the eqn. of circle is :(−x h)2+(y−k)2=r2

Comparing with the given eqn. of circle, we find, r2=289 Hence, radius is 17