2004

Extract or Calculate Geometric Information from Objects | 255
Obtain Area Information
You can calculate and display the area and perimeter of a sequence of points
or of any of several types of objects. If you need to calculate the combined
area of more than one object, you can keep a running total as you add or
subtract one area at a time from the selection set. You cannot use window
selection or crossing selection to select objects.
Calculate a Defined Area
You can measure an arbitrary closed region defined by the points you specify.
The points must lie on a plane parallel to the XY plane of the current UCS.
Calculate the Area, Perimeter, or Circumference of an Object
You can calculate the enclosed area and perimeter or circumference of circles,
ellipses, polylines, polygons, regions, and AutoCAD 3D solids. The displayed
information differs according to the type of object you select:
■ Circles. Area and circumference are displayed.
■ Ellipses, closed polylines, polygons, planar closed spline curves, and
regions. Area and perimeter are displayed. For wide polylines, this area is
defined by the center of the width.
■ Open objects such as open spline curves and open polylines. Area and
length are displayed. The area is computed as though a straight line
connected the start point and endpoint.
■ AutoCAD 3D solids. Total 3D area for the object is displayed.
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points specified arbitrary closed region