How do I check a radius around a sprite

I kinda worded it weird in the title.

what i need to do is

1) create a circle around the player

2) have the player select a point on the circles circumference

3) get rid of the old circle and replace it with a new one

4) select a point on the circle and teleport the player to it.

ideally the player will be using a game-pad with a joystick, but i would also like to find a way to effectively do it using mouse and keyboard

any help is appreciated

im working on a solution using pin's and angle setting

ill post updates