Top left:
x=180-90-35-30
x=90-35-30
x=90-65
x=25
Bottom left:
x=180-(180-(40+116)+35)-40
x=180-(180-156+36)-40
x=180-(24+36)-40
x=180-(60)-40
x=180-100
x=80
Right:
x+12+(180-90-74)=180-90-45
x+12+(90-74)=180-90-745
x+12+16=180-90-45
x+28=180-90-45
x=180-90-45-28
x=90-45-28
x=45-28
x=17
Hope this helps :)
