Angle E is 110 degrees because two linear pairs makes 180 degrees so we take 180 -70 =110.
We also know Angle A and B are on a isosceles triangle because the side has one tally mark indicating that both sides are equal . So because of vertical angles we know one angle that is NOT A or B Is 70 degrees. We know that a triangle is a total of 180 degrees so we take 180-70 =110 BUT since we have two angles with sand unknown we take 110 degrees divide it by two which equals 55 degrees each .
So to recap:
Angle E is 110 degrees
Angle A is 55 degrees
Angle B is 55 degrees