hello cindychen1
how is your day going 
so I suck at math 
but a put this in a calculator and a came out.....
drum roll plz.
/\//\/\\/\/\/\/\/\/\/\
Y=52 degrees 
/\/\\/\/\\/\/\/\/\/\\/\\
hope this helps u 
have a fanatsic day 
if a was worng plz let me know
-toby out!