When we have a circumference on the plane, a point can be in three different positions regarding the circle we have in the drawing:

- Point outside the circumference

If the distance from the point to the center point of the circumference is greater than the length of the radius.

- Point on the circumference

If the distance from the point at the center of the circumference is exactly equal to the length of the radius of the circumference.

- Point within the circumference

If the distance from the point to the center of the circumference is less than the length of the radius.