If a person is looking up at a point, then the angle between the line of sight and the horizontal is called _________.
If a person is looking down at an object, then the angle the man’s line of sight makes with the horizontal is the angle of __.
If a person is looking up at an object, then the angle made by man’s line of sight with his eye level is the angle of __.
If a person is looking down at an object, then the angle the man’s line of sight makes with his eye level is the angle of ___.