How To Calculate Total Perimeter In AutoCAD?

Understanding Total Perimeter Calculation in AutoCAD

Calculating the total perimeter of shapes in AutoCAD can seem intimidating, but with the right steps, it becomes a straightforward process. This guide will walk you through the methods of determining the perimeter for different shapes in AutoCAD.

Steps to Calculate Perimeter with Polylines and Regions

1. Creating a Polyline:

   • Begin by drawing the shape using the Polyline tool. Activate the command by typing PL and pressing Enter.
   • Click to define points that outline your shape. Complete the drawing by entering C to close the polyline.

2. Exploding the Polyline:

   • If you’ve used a closed polyline, you may want to convert it into a region for more accurate property inquiries. Type EXPLODE in the command line, select your polyline, and hit Enter. This action will convert the polyline into individual line segments.

3. Turning the Polyline into a Region:

   • Select the polyline and convert it into a region using the REGION command. This transformation is crucial as it allows for more detailed measurements of various properties.
4. Using Mass Properties:
   • Navigate to the toolbar and select Tools. From there, choose Inquiry and select Mass Properties.
   • This tool will provide a comprehensive list of details, including the perimeter length of the created shape, listed among other properties.

Measuring Perimeter of a Rectangle or Square

1. Direct Measurement:

   • To find the perimeter of a rectangle, simply use the formula: Perimeter = 2 × (Length + Width).
   • Alternatively, you can use the area measurement tool provided by AutoCAD. Click Home, navigate to the Utilities panel, select the Measure drop-down, and choose Area.
2. Using the Area Command:
   • Type AREA in the command line. When prompted, select Object and click on the rectangle or square. The properties, including area and perimeter, will be displayed in the command line.

Finding the Perimeter of Complex Shapes

1. Drawing the Shape:

   • For non-standard shapes, use the Polyline tool (PL) to outline the shape accurately. Ensure it’s closed.
2. Mass Properties Inquiry:
   • After converting the shape into a region as mentioned in earlier steps, access the Mass Properties tool to retrieve the perimeter.

Setting Parameters in AutoCAD

1. Accessing Parameters Manager:

   • Click on the Manage tab and locate Parameters Manager in the panel.
   • Here, you can edit existing parameters or create new ones.
2. Editing Parameters:
   • In the Parameters Manager, select the row of the parameter you wish to modify, click in the Expression field, and enter your desired value or formula.

Frequently Asked Questions

1. Can AutoCAD calculate the perimeter of an irregular shape?
Yes, AutoCAD can determine the perimeter of irregular shapes by converting them into regions using the mass properties inquiry, much like it does with regular shapes.

2. What is the difference between a polyline and a region in AutoCAD?
A polyline is a series of connected line segments forming a continuous shape, whereas a region is a two-dimensional area that can have properties measured, including area and perimeter.

3. How can I ensure accuracy when measuring perimeter in AutoCAD?
Ensure that all your shapes are closed and properly defined. Use the area and mass properties tools to confirm measurements and verify calculations to maintain accuracy.