vertical angle

vertical angleAngles 1 and 3 are vertical angles, as are angles 2 and 4.

vertical angle

n. Either of two angles formed by two intersecting lines and lying on opposite sides of the point of intersection.

ver′tical an′gle

n. one of two opposite and equal angles formed by the intersection of two lines. [1565–75]

Thesaurus

Noun

1.

vertical angle - either of two equal and opposite angles formed by the intersection of two straight linesangle - the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians