Question

http://prntscr.com/d9biy6

Answer 1

this is our triangle

we want to label our sides of the triangle

Answer 2

a = adjacent
h=hypotenuse (always opposite the right angle)
o= opposite (always opposite the angle we want to work out)

Answer 3

I will label the angle I want to work out, x

Answer 4

you must remember sohcahtoa
soh means Sin(x)=o/h
cah means cos(x)=a/h
toa means tan(x)=o/a

since we have all side lengths, we don't care which one we use, so take your pick
I personally would just use soh

so

sin(x)=o/h
o=12
h=13

Answer 5

use your calculator