The rad function determines the radius of a selected object.
Determines the radius of a selected object. The object can be a circle, an arc, or a 2D polyline arc segment.
The following example uses rad with the CIRCLE command. The radius of the new circle is two-thirds of the radius of the selected polyline arc segment:
Command: circle
Specify center point for circle or [3P/2P/Ttr (tangent tangent radius)]: cen
of Select the circle
Specify radius of circle or [Diameter] <last>: 'cal
>> Expression: 2/3*rad
>> Select circle, arc or polyline segment for RAD function: Select the circle