Answer:
angles on a line add up to 180 degrees
180 - 40 = 140
180 degrees in a triangle. going to work out the base angles for the isosceles triangle as its top angle is 140 degrees.
180 - 140 = 40
base angles are equal so 40/2 = 20 degrees
X = 20 degrees
90 degrees angle has been indicated.
90-20 = 70
180 - 70 - 40 = 70
y = 70 degrees
