Answer:
y = 60
Explanation:
The exterior angles of a regular polygon add up to 360. Try drawing a square which has exterior angles = 90 degrees or an equilateral triangle which has an exterior angle of 120.
Formula is
Exterior angle = 360 / number of sides
number of sides = 6
Exterior angle = 360/6 = 60
x is the supplement of y
x + y = 180
x + 60 = 180 Subtract 60 from both sides
x = 180 - 60
x = 120