Find angle x, in degrees.
The inside angles of a triangle sum to 180 degrees 29 + 82 + 'other angle' = 180
'other angle' = 180 - 29 - 82 solve for 'other angle'
'other angle' + x form a straight line
'other angle' + x = 180 solve for 'x'
x is an exterior angle, there is a rule that says
so x = 29 + 82 = 111