Question

What are the center and radius of a circle whose equation is:

(x−A)2+(y−B)2=C
Question options:

a)

Center: (−A,−B), radius = C

b)

Center: (−A,−B), radius =C −−√

c)

Center: (A, B), radius = C

d)

Center: (A, B), radius =C −−√

Answer 1

d)

Explanation:

Equation of circle with center at point (h, k) and radius, r.

`(x - h)^2 + (y - k)^2 = r^2`

This problem:

(x − A)^2 + (y − B)^2 = C

The center is (A, B).

The radius is sqrt(C).

Answer: d)