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Math·Geometry and Trigonometry·Circles

easy

A circle in the xy-plane has its center at $(6,9)$ and has a radius of length $8$. Which equation represents this circle?

A

$(x+6{)}^2+(y+9{)}^2=8$

B

$(x-6{)}^2+(y-9{)}^2=8$

C

$(x+6{)}^2+(y+9{)}^2=64$

D

$(x-6{)}^2+(y-9{)}^2=64$