2012

Menu: Tools ➤ Inquiry ➤ Region/Mass Properties
Toolbar: Inquiry
Summary
Refer to the Help system for a complete list of definitions for each of the region
or mass properties computed.
List of Prompts
The following prompts are displayed.
Select objects: Use an object selection method
If you select multiple regions, only those that are coplanar with the first
selected region are accepted.
MASSPROP displays the mass properties in the text window, and then asks if
you want to write the mass properties to a text file (.mpr).
The properties that MASSPROP displays depend on whether the selected objects
are regions, and whether the selected regions are coplanar with the XY plane
of the current user coordinate system (UCS), or 3D solids. For a list of the
parameters that control the MASSPROP units, see
Calculations Based on the
Current UCS
.
Regions
The following table shows the mass properties that are displayed for all regions.
Mass properties for all regions
DescriptionMass property
The surface area of AutoCAD 3D solids or the enclosed area of regions.Area
The total length of the inside and outside loops of a region. The
perimeter of a 3D solid is not calculated.
Perimeter
The two coordinates that define the bounding box. For regions that
are coplanar with the XY plane of the current user coordinate system,
Bounding box
the bounding box is defined by the diagonally opposite corners of a
rectangle that encloses the region. For regions that are not coplanar
with the XY plane of the current UCS, the bounding box is defined
by the diagonally opposite corners of a 3D box that encloses the re-
gion.
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