Understanding Perimeter in AutoCAD
Calculating the perimeter of shapes in AutoCAD is an essential skill for any user. By utilizing specific commands, you can easily find the perimeter of either defined shapes or drawn objects within your project. The following steps will guide you through the process to efficiently determine the perimeter in AutoCAD.
Step-by-Step Guide to Find the Perimeter of Shapes
1. Setting Up Your Environment
Before you start, ensure your AutoCAD workspace is ready. Open your drawing file that contains the shape whose perimeter you wish to calculate. Familiarize yourself with the commonly used toolbars, specifically the Home tab where most measurement tools are located.
2. Using the MEASUREGEOM Command
The MEASUREGEOM command is a straightforward way to find the perimeter of your shapes:
- Access the command by typing MEASUREGEOM into the command line and pressing Enter.
- Select the PERIMETER option when prompted.
- Click on the edges of the shape, or select a closed polygon. You will see the perimeter value displayed in the command line and in a tooltip.
3. Creating a Closed Polyline
If your shape is not a closed object, you can first create a closed polyline:
- Type PLINE into the command line and hit Enter.
- Click to define the first point of your polyline. Move your cursor to the next point and click again to define its endpoints.
- Press Enter when you’ve finished drawing your polygon to close the shape.
4. Calculating Perimeter through Properties Palette
Once you have a closed shape or polyline, follow these steps to find its perimeter:
- Click on the polyline to select it.
- Open the Properties palette by right-clicking the object and selecting Properties.
- Look for the Geometry section in the Properties palette where the perimeter will be listed alongside other measurements.
5. Using the AREA Command for Additional Details
The AREA command not only calculates the area but also provides the perimeter:
- Type AREA into the command line and press Enter.
- When prompted, select the Object option by typing the letter O and pressing Enter.
- Select the existing shape. The command line will display both area and perimeter measurements.
Alternative Methods to Measure Perimeter
Using the BOUNDARY Command:
The BOUNDARY command allows you to create a closed boundary around an area, which can then be measured:
- Type BOUNDARY and hit Enter.
- Select the area you want to bound. This creates a closed polyline.
- After creating the boundary, use the Properties palette or the MEASUREGEOM command to find its perimeter.
Creating Custom Objects:
For irregular shapes, drawing them manually using lines or arcs can be necessary:
- Create the shape using line and arc tools.
- Select the shape and use the aforementioned methods—Properties palette or MEASUREGEOM—to obtain the perimeter.
Frequently Asked Questions
1. Can I measure the perimeter of multiple objects at once in AutoCAD?
AutoCAD allows you to select multiple objects when using the MEASUREGEOM or AREA commands. This provides a cumulative perimeter measurement of all selected shapes.
2. What if I have an irregular shape?
For irregular shapes, it’s best to create a polyline that outlines the shape. Once a closed polyline is created, use the previously mentioned methods to easily find the perimeter.
3. Is there a way to display measurements directly on my drawing?
Yes, you can use the DIMENSION command to create linear dimensions that can show perimeter measurements directly on the drawing, providing clear visibility for reference.
