AutoCAD supplies a list of inquiry commands which assist you in getting information about an entity or group of entities or to calculate an area of a plane.
DISTANCE (DIST): This command helps you to measures the distance and angle between any two points.
Command: DIST (return) First point: Second point:
Result: Distance = calculated distance Angle in XY plane = angle, Angle from XY plane = angle Delta X = change in X, Delta Y = change in Y, Delta Z = change in Z
AREA:This command calculates the area and perimeter of selected objects (Area and circumference in case of circles).
Command: AREA(return) <First point> / Object / Add / Subtract: This command allows you options like:
|First Point||Calculates the area and perimeter you define by selecting points. All points must lie in a plane parallel to the XY plane|
|Object||Calculates the area and perimeter of the selected object. You can calculate the area of circles, ellipses, splines, polylines, polygons, regions, and solids|
|Add||Turns on Add mode and keeps a running balance of additions and subtractions|
|Subtract||Turns on Subtract mode, which works the same as Add mode, except that it subtracts areas and perimeters|
LIST: This command displays information about the selected objects.
Command: LIST (return) Select objects: Suppose that you have selected a circle of colour green and linetype hidden then,
LIST displays: CIRCLE Layer: 0 Space: Model space Color: 3 (green) Linetype: HIDDEN Handle = <value> Center point, X= <co-ordinate> Y= <co-ordinate> Z= <co-ordinate> Radius <number> Circumference <number> Area <number>
ID (IDentify point): This command displays the X, Y and Z co-ordinate values of a selected point.
Command: ID (return) Point: (select a point)
HELP This command allows you to display the Help table of contents. Press F1 or choose Contents from the Help menu. To display help for a menu, open the menu, and then press F1 or to get information about any command, invoke HELP command transparently by putting a single apostrophe. Command: HELP or ? (return) or Press Function Key F1