How to find the angle of a circle hit by a ball (bumper system)

Hi Guys,

I’m looking a way to find the exact angle hit by a ball on a circle object.
The objective is to do a bumper system that reflect the ball in this exact angle. Maybe it’s not the perfect way to do it but I think if I have the angle, then I can reflect the ball on X and Y precisely.

The game is in 2D.

Sorry if I made some mistake on my English.
Thanks for your help.

There’s no such thing as a “circle” or a “ball” in Unity so if you want specific helps, you’ll have to be more specific on what you’re asking i.e. state what types of Unity objects you’re using and what you’ve got right now, maybe show some code etc.