Hi all,
during some hobby research I encountered a geometrical problem I can't solve for my knowledge. I hope you can give me some help:

I have a square which I know the edge length (1); then I have a point, outside of it, and segments that connect it to each square's vertex. I know the angles between each segment and the next.
I need to know the length of at least two segments, and/or the coordinates of the observer if we place all them in a Cartesian plane.

This is needed for me for a sort of "perspective identification": i need to know the observer's orientation (yaw/pitch/roll) and distance w.r.t. to the reference square. Only when the above problem is solved, I think I can easily adapt it into 3D. But if you have good solution for this "bigger" problem too, feel free to inform me

Many many many thanks!!! and greetings from Italy!

Enrico