In an isosceles triangle, the angle between the two equal sides is 40 degrees. Each base angle is what?

1. The two base angles of an isosceles triangle are equal. 2. The three angles add up to 180 degrees. 3. Sum of base angles = 180 - 40 = 140 degrees. 4. Each base angle = 140 / 2 = 70 degrees. _Source: Wikipedia, Isosceles triangle (CC BY-SA 4.0), Isosceles triangle_