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The Haochen CAD software offers various methods for calculating the area and perimeter of CAD drawings, and it is usually possible to calculate both the area and the perimeter at the same time. However, different methods have different focuses, and even their areas of application vary; all of these factors affect the drawing efficiency of CAD designers. Next, the editor will provide a comprehensive explanation of the area and perimeter measurement commands in CAD, along with recommendation scores to help you choose the appropriate CAD drawing techniques for measuring the area and perimeter of CAD drawings more quickly. 1. Property bar (Ctrl+1): Recommendation rating ★★★. After selecting an object, we can see all the relevant parameters of that object in the property bar, including area and perimeter. For example, when we select closed shapes made up of rectangles, circles, polylines, etc., the perimeter and area can be found in the property bar, and other attributes can also be viewed at the same time. But if it is a closed shape formed by broken lines, rather than a single unified object, then we first need to convert the boundaries of this area into a unified entity, and then use the property bar to measure the area and perimeter. So, how to convert? Method 1: The usual approach for stroke combinations is to use PL lines to draw each stroke individually, and then calculate the enclosed shape that results from those strokes. This process needs to be carried out in one go without interruption; if it is interrupted, the join or pe command must be used to combine the parts again, after which the area and perimeter of the closed PL lines need to be calculated. So it takes quite a lot of time. Method 2: Merge the fragmented lines. However, some clever individuals realized that since the join or pe commands can be used to combine fragmented lines, we can simply use these two commands to combine the fragmented lines at the boundaries and then calculate the area and perimeter, thereby avoiding the need to outline them. Method 3: Boundary creation – If you do not want to merge the broken lines, or if it is not convenient to select all of them at once, you can use the bo command (boundary) to create a boundary. Click inside the closed interval to create its boundary. This boundary is a closed polyline, and its perimeter and area can be viewed directly in the property bar. The bo command is resource-intensive for the computer; if it is a complex command, or if there is a tiny opening in the graphic that is not visible to the eye, the execution time of this command will be longer. Therefore, it is recommended to perform segmented calculations for complex shapes. Additionally, the property bar allows you to view the area of unclosed objects; the CAD software virtually adds a straight line between the two unclosed nodes to close them, and the area is calculated based on this. For example, the areas of the following two figures are the same. The property bar can also display the area of the pattern fill; this area corresponds to the area of the boundary of the fill, although a pattern fill does not have a perimeter. 2. The li query list (list) has a recommendation rating of ★★; it’s very simple – just execute the command while selecting the desired object. Of course, the selected object must be a closed entity, and it is also not possible to view the area or perimeter of the hatch pattern. For the processing of broken lines, the method mentioned above is used. 3. AA command recommendation rating: ★ This command is used to determine area by tracing outlines, but it cannot measure perimeter. The result can only be obtained after the tracing is completed; it cannot be interrupted midway. It struggles with dotted lines and complex boundaries, so the editor does not really recommend it. The only advantage is that for areas without boundaries, they can be virtually enclosed using outlines. However, in the menu area of this command, one can see many other query functions, including the li command mentioned above. The total area allows for the calculation of the sum of the areas of multiple enclosed regions at once, by simply clicking on each region one by one. It should be noted that the area calculated generally has no relation to the drawing scale; this value is related to the drawing units set in CAD. For example, when drawing in millimeters, 1 meter is represented as 1000 in CAD; most mechanical drawings are created using millimeters as the unit of measurement. Thus, the value of 1000 represents 1000 square millimeters. Area conversion requires manual effort. After going through the above CAD tutorials, don’t you think they are full of useful information and very practical? Everyone no longer needs to worry about how to measure the area and perimeter of shapes in CAD drawings!