Write the equation of a circle with a center at (0, 0) and a radius of 5.

Question

hartnn · Answer

Equation of circle with centre h.k and radius r is just 
$ \large (x-h)^2 + (y-k)^2 = r^2$

here, centre h,k = 0,0 
r =5
just plug in values!

anonymous · Answer

@hartnn  could you help with that showing the steps

hartnn · Answer

not much steps, you have formula, you have values
just plug them in!

anonymous · Answer

@hartnn  not sure how to do that, :( thats why I am asking for help with this problem

hartnn · Answer

you are having problems with plugging in values ? or something else ?

anonymous · Answer

(x−h)2+(y−k)2=r2                              (x-0) (y-0)  r = 5 @hartnn

hartnn · Answer

if you plug h = k = 0, and r = 5 in the formula
you get 
$(x-0)^2 + (y-0)^2 = 5^2$
now just simplify! :)

hartnn · Answer

whats 5^2 = ..?

anonymous · Answer

ok thanks I got it from here @hartnn

hartnn · Answer

good! 
welcome ^_^