Answer:
x = 66 degrees, y = 57 degrees
Step-by-step explanation:
180 - 123 = 57 = y
57 + 57 + x = 180
114 + x = 180
x = 66
x = 70
y = 55
Exterior angle = Sum of opposite angles
x + y = 125
y + 125 = 180
( because this is an isosceles triangle )
y = 180 - 125
Substitute y = 55 in eq. x + y = 125,
x + 55 = 125
x = 125 - 55
