Question

what is the equation of a circle whose center is at the origin and whose radius is 9

Answer 1

(x-a)^2+(y-b)^2=r^2
(a,b) is centre
and r= radius

Answer 2

at origin a=0 and b=0 and radius is given plug in all the values

Answer 3

sooo.... it would be x^2+y^2=3

Answer 4

lol r=9
9^2=
x^2+y^2=9^2

Answer 5

so its X^2+Y^2=9 lol

Answer 6

9^2=81 not 9