GED Math Practice Test

What type of line intersects two or more parallel lines?

1. Bisector

2. Vertical angle

3. Transversal

4. Straight angle

The correct answer is: Transversal

The correct answer is a transversal. A transversal is defined as a line that crosses two or more other lines at distinct points. When this happens with parallel lines, the transversal creates special angle relationships, such as corresponding angles, alternate interior angles, and alternate exterior angles, which are all equal when the lines are parallel. This property is fundamental in geometry when analyzing angles formed by a transversal cutting through parallel lines. Other types of lines mentioned do not serve the same purpose. For instance, a bisector typically refers to a line that divides an angle or segment into two equal parts, which is unrelated to the concept of intersecting lines. Vertical angles are formed by the intersection of two lines, but they do not apply specifically in the context of parallel lines crossed by another line. A straight angle, defined as an angle that measures 180 degrees, does not relate to the concept of intersecting lines at all. Hence, the most appropriate choice in this context is indeed a transversal.