1 Answer

Nforss · Answer 1 · 2019-07-11T10:41:58+0000

The equation of a circle:

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

where

(h, k) - the coordinates of a center

r - the radius

We have

(1, 1) → h = 1 and k = 1

r = 5

Substitute:

$(x-1)^2+(y-1)^2=5^2\\\\(x-1)^2+(y-1)^2=25$

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