One of the four angles formed by the intersection of two straight lines is 41 °. What are the other three angles?

In the case of intersection of two straight lines, by definition, two pairs of equal angles will be formed.

Consequently, one of the three angles unknown to us has the same degree value as the angle specified in the conditions.

Let’s calculate what the degree value of any of the other pair of resulting angles will be equal to, if we know that each angle forms a rotated angle with each angle from the first pair:

180 – 41 = 139.

Answer: In this case, two angles will be with a degree value equal to 139 °, and one equal to 41 °.