Question

Help!
(x-9)^2 + (y-4)^2 = 36
h=?
k=?
radius=?
diameter=?

Answer 1

Given equation:

• (x-9)^2 + (y-4)^2 = 36

Equation of circle:

• (x - h)^2 + (y - k)^2 = r^2

Compare and get the values:

• h = 9
• k = 4
• r ^2 = 36 ⇒ r = 6
• d = 2r = 2*6 = 12