Write an equation for a circle with center at
P(2, -5) and a diameter of 8 units.

a. (x-2)^2 + (y-5)^2 = 64
b. (x+2)^2 + (y+5)^2 = 8
c. (x-2)^2 + (y+5)^2 = 16
d. (x+2)^2 + (y-5)^2 =16

Is answer C right?

Question

Write an equation for a circle with center at 
P(2, -5) and a diameter of 8 units. 

a. (x-2)^2 + (y-5)^2 = 64
b. (x+2)^2 + (y+5)^2 = 8
c. (x-2)^2 + (y+5)^2 = 16
d. (x+2)^2 + (y-5)^2 =16

Is answer C right?

anonymous · Answer

http://www.mathwarehouse.com/geometry/circle/images/equation-of-circle/general-formula-equation-of-circle.png

anonymous · Answer

the equation of a circle is $(x-h)^2+(y-k)^2=r^2$ where $(h,k)$ is the center and r is the radius...yes, $C$ is correct! :)