This is a problem that I was set by my physics teacher but really seems to be more of a maths problem than a physics one.
I have read the guidelines for homework questions and I think I've met all the criteria, I have tried very hard to solve this but I've had no luck, though I did manage to prove the first one, but in a very inelegant manner that I was hoping someone could improve on. Anyway here's the question:
I think however the question is wrong. The prism is not a square prism. It could just be me though.
Thanks for your help in advance!