When only 90 Deg is given

[HDSheard]

Hi, I work in construction and understand the pythagorean theory and many other equations. A problem I often come by is I have a 90 deg triangle and the linear measurements of all sides. I need to learn how to find the two unknown angles. I greatly appreciate any help.

 

[HDSheard]

Alright!

Yes this does help. I become very perplexed and bothered; thinking that I was making it more difficult than it needs to be. Knowing now that it is more in the realms of trig, I guess I'll have to give myself and others a little brake.
I never took trig and barely passed algebra; I struggle at "long-hand" even with the help of a calculator. So I may or may not take the time to know the long-hand formula, but I'll defiantly look into a scientific calculator as to add another tool in my tool box!
This is the first time I ever tried a site like this so I appreciate your immediate response.