Find the center and the radius of the circle: (x - 1)^2 + (y + 3)^2 = 4.
2 Answers | Add Yours
We'll write the standard equation of the circle:
(x-h)^2 + (y-k)^2 = r^2
(h,k) represent the center of the circle and r is the radius of the circle.
Comparing the given equation and the standard form, we'll get:
h = 1 , k = -3 and r = sqrt4 = 2
The center of the circle has the coordinates C(1 , -3) and the radius r = 2.
Join to answer this question
Join a community of thousands of dedicated teachers and students.Join eNotes