What’s the radius of a circle (x+2)^2 + (y-5)^2=9

Question

asked Jul 18, 2021 183k views

1 Answer

Punit S · Answer 1 · 2021-07-24T20:58:28+0000

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Step-by-step explanation:

The equation

(x+2)^2 + (y-5)^2=9

is the same as

(x-(-2))^2 + (y-5)^2=3^2

Compare this to

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

We see the center is (h,k) = (-2,5) and the radius is r = 3.