What does a positive rotation imply in terms of direction?

A positive rotation is defined in geometry as a rotation that moves in the counterclockwise direction. This is a standard convention used in mathematics, particularly in the context of the Cartesian coordinate system, where angles are measured from the positive x-axis. When an angle is measured in the positive direction, it signifies that the movement to reach that angle is counterclockwise around the origin.

In contrast, a clockwise rotation would be considered a negative rotation. The other options—horizontal and vertical—do not pertain to the concept of rotation direction and thus do not apply to the context of this question. Therefore, identifying a positive rotation as counterclockwise accurately reflects the established geometric conventions.