Question

given that ab is a line segment and the angle y = 57°, work out the value of the angle marked x .

Answer 1

Answer:

x+y=180°

x+57°=180

x=180-57

=123°

Answer 2

angle x and angle y are supplementary.

so

angle x + angle y =180 degree.

=> angle x = 180 degree - 57 degree

= 123 degree