Using trigonometry to find heights of unmeasurable objects project idea?

I need to write a practice internal assessment in maths which is basically a write up of a maths project. I'm really interested in trigonometry so I thought of using trigonometry to find the heights of unmeasurable objects and my teacher liked it but told me to make it a little more 'complicated'. I thought of navigation but I think a lot of others will be doing that so I was wondering if there were other ways to complicate this topic.

Could I maybe do something like: "What are the dimensions of the largest room that can built in the tv tower/a random house?" In that would it work if I used trig to find the height and dimensions and then somehow calculate the largest room? If yes, then does anyone have any idea how to do calculate the largest room?

You don't have to answer every question I have asked here because any input would be extremely helpful!
Thanks in advance! :)

By the way, I'm in 11th grade so that should give you an idea of how complicated the topic should be.