What do measurements in degrees of the distance between a reference plane and a line drawn from a point on the plane denote?

The correct answer is angles. Measurements expressed in degrees represent the amount of rotation between two lines originating from the same point. When you draw a line from a point on a reference plane and measure the distance to another line with respect to this plane, you are essentially calculating the angle formed by these two lines. Angles are quantified in degrees, where one complete rotation around a point is 360 degrees. Thus, when assessing the relationship between a reference plane and a line from that plane, you are determining a specific angle based on that relationship.

In contrast, areas refer to the measurement of a surface, volumes pertain to the measurement of space within three-dimensional objects, and dimensions typically describe the size or extent of an object in terms of length, width, height, or depth. These concepts do not pertain to the radius of rotational measurement that angles embody.