A circle is centred at and has radius

MATHEMATICS · Single correct · CBSE · Mathematics · Conic Sections · Conic Sections

Problem

A circle is centred at

(a,b)

and has radius

2\sqrt{3}

. Which equation correctly represents this circle? (a)

(x+a)^2+(y+b)^2=12

(b)

(x-a)^2+(y-b)^2=12

(c)

(x-a)^2+(y-b)^2=6

(d)

(x+a)^2+(y+b)^2=4\sqrt{3}