Used MassPlus for Windows?
Developer’s Description
By CAD Systems
MassPlus V7.0 now supports splines in addition to lines, arcs, circles, and polylines. Direct interface with AutoCAD is now supported. Selected AutoCAD entities are displayed in the MassPlus graphics window. Customizable units of measure for drawing and converted values. Demo provides accurate values for Area and X-value of the centroid. Double the accuracy from previous versions.
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