Geometric Information

You can obtain information about the relation between two specified points or multiple points; for example, the distance between points or their angle in the XY plane. To determine the relation between points, you can display the

• Distance between them
• Angle between the points in the XY plane
• Angle of the points from the XY plane
• Delta, or changed, X, Y, and Z distances between them

The ID command lists the X, Y, and Z coordinate values of a specified point.

You can obtain the area, perimeter, and mass properties defined by selected objects or a sequence of points. You can calculate the area and perimeter of a sequence of points. You can also obtain the area, perimeter, and mass properties of any of several types of objects. TipA fast way to calculate an area bounded by several objects in 2D is to use the BOUNDARY command. With BOUNDARY, you can pick a point within the area to create a closed polyline or region. You can then use the Properties palette or the LIST command to find the area and perimeter of the polyline or region.

Use Commands to Calculate Area – With the MEASUREGEOM and AREA commands, you can specify a series of points or select an object to calculate area. If you need to calculate the combined area of mutiple objects, 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.

Total area and perimeter are saved in the AREA and PERIMETER system variables. In addition to area, with the MEASUREGEOM command, you can obtain geometric information from objects such as distance, radius, angle, and volume.

Define an 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.

You can calculate the enclosed area and perimeter or circumference of circles, ellipses, polylines, polygons, regions, and AutoCAD 3D solids. The information displayed depends on the type of object selected

• Area and circumference display.
• Ellipses, closed polylines, polygons, planar closed spline curves, and regions. Area and perimeter display. 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 display. Area is calcuated as though a straight line connects the start point and endpoint. AutoCAD 3D solids. Total 3D area for the object displays.