Question

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

Answer 1

You can use the formula \[(x-h)^2+(y-k)^2=r^2\] where r is the radius of the circle and (h,k) are the coordinates of the centre of the circle.

Answer 2

yes right (h,k) are the co-ordinates of the centre and r is the radius.