For things like this, I don't even bother with calculating. Had to do a lot of it at school and college so it's nice to simply use the internet! I think I'd struggle to calculate it without practice now. If you type in triangle calculator there are websites that work it all out for you. You only need three figures.
Your triangle is near enough a right angled triangle, and results are as follows
Sent from my iPhone using Tapatalk
__________________
How to view a car - everything you need to help you inspect a used car
VIS motor tester avalible to local members
Injector removal tool and auto gearbox pressure tester now available