Question

Find the coordinates of the center and the length of the radius of the following circle.

(x - 3)^2 + (y - 7)^2 = 49

Answer 1

(3,7) , 7

Answer 2

(3,-7)

r=7

Answer 3

(3,7) radius 7

Answer 4

standard equation of a circle
(x-a)^2+(y-b)^2=r^2
center (a, b)
radius r
compare it with the given equation
center (3,7) and radius 7

Answer 5

(x-a)^2 + (y-b)^2 = r^2

centre is (a,b), radius = r