There is a point A at (x,y). How do I get list of all points within a circle of centre A in the radius r?

Question

If (80,40) is A and radius is 5, then I need list of all points within a curvle of radius 5 with (80,40) as centre on a cartician plane.

Answer 1

The radius is 5. If a point is in the circle, the length from that point to the centre should be less than 5, right?

You can get the length with sqrt(x*x+y*y)

Answer 2

thanks