Cylindrical coordinate entry is the 3D equivalent of 2D polar coordinate entry. It specifies an additional coordinate on an axis that is perpendicular to the XY plane. A cylindrical coordinate describes a point by its distance in the XY plane from the UCS origin, its angle from the X axis in the XY plane, and its Z value. You specify a point using the following syntax:
X<[angle from X axis],Z
In the illustration below, the coordinate 5<60,6 indicates a point 5 units from the origin of the current UCS, 60 degrees from the X axis in the XY plane, and 6 units along the Z axis. The coordinate 8<30,1 indicates a point 8 units from the origin of the current UCS in the XY plane, 30 degrees from the X axis in the XY plane, and 1 unit along the Z axis.
When you need to define a point based on a previous point, you can enter relative cylindrical coordinates with the @ symbol. In the illustration below, the relative cylindrical coordinate @4<45,5 indicates a point 4 units in the XY plane from the last point entered, at an angle of 45 degrees from the positive X direction, and extending 5 units in the Z direction.
