What is the two non adjacent angles formed by intersecting lines?

The two non-adjacent angles formed by intersecting lines are known as vertical angles. When two lines intersect, they create two pairs of vertical angles, which are opposite each other. Vertical angles are always equal in measure, making them a key concept in geometry. For example, if two lines intersect to form angles of 30 degrees and 150 degrees, the angles opposite each other (the vertical angles) will both be 30 degrees.