Facing Target Problem

Hey,

I have a GameObject (Player) and a second GameObject (Enemy).
I try to find out if the player is facing the Enemy

It's basically just a cone in front and check if Target is within it. Cone is calculated with Angle & max Distance
Getting the the distance is fine, but checking if Target is within the angle is my issue.

Image example: https://imgur.com/a/KYEVtLL

Tried a lot of different things like below to get angle, no luck

Code (CSharp):

1. Vector3 targetDir = -transform.position + Target.transform.position;
2.             float angle = Vector3.Angle(targetDir, transform.right);

Transform.right is correct as that's "front" for my gameObject's sprite.

Code (CSharp):

1. Debug.DrawRay(transform.position, transform.right, Color.red, 25f);

Confirms that

Bugged - I can't remove the two broken Images I added.

 

I'd use a dot product for this.
But im not sure how this applies to 2D.

 

used this video to solve my problem