angle terminal side

The terminal side of an angle θ drawn in angle standard position is the side which isn't the initial side. When viewing an angle as the amount of rotation about the intersection point (the vertex) needed to bring one of two intersecting lines (or line segments) into correspondence with the other, the line (or line segment) towards which the initial side is being rotated the terminal side.

angle | coterminal angle | initial side | intersection | line | line segment | rotation | vertex