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What is the equation of the circle with center (3.2, -2.1) and radius 4.3?

A. (x+2.1)^2 + (y-3.2)^2 = 8.6
B. (x-3.2)^2 + (y+2.1)^2 = (4.3)^2
C. (x+3.2)^2 + (y-2.1)^2 = 4.3
D. (x-2.1)^2 - (y+3.2)^2 = (4.3)^2

Respuesta :

the answer should be B.
equation of a circle is (x-h)^2 + (y-k)^2 = r^2
where (h,k) are the center coordinates and r is the radius
shout the answer should be (x-3.2)^2 + (y+ 2.1)^2 = 4.3^2

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