Assuming these are straight lines.
Even if they are straight lines, if that's a 2d projection of something on a non-flat 3d surface, it can also change the way the angles fit together.
If these aren't straight lines, drag has no idea what the answer is and thinks it might be impossible to tell.
People tweeting stuff. We allow tweets from anyone.
RULES:
Assuming these are straight lines.
Even if they are straight lines, if that's a 2d projection of something on a non-flat 3d surface, it can also change the way the angles fit together.
If these aren't straight lines, drag has no idea what the answer is and thinks it might be impossible to tell.