To join perpendicular lines in AutoCAD using the standard "Join" command as referenced, you can follow these steps. While the `JOIN` command is primarily designed for lines that are collinear or have touching endpoints for creating a single polyline segment, you can apply the command to perpendicular lines that meet at a corner. Note that using the basic `JOIN` command on two simple, non-polyline lines meeting at a right angle typically requires them to be converted to polylines first (often automatically handled by `JOIN` or `PEDIT` methods) to form a single polyline object.
Here is the straightforward method using the `JOIN` command:
## Steps to Join Lines Using the Join Command
Based on the provided reference, the process is simple:
1. **Type the Command:** In the AutoCAD command line, type `JOIN`.
2. **Select Objects:** Select the perpendicular lines you wish to "join". Ensure their endpoints meet at a common point.
3. **Confirm Selection:** Press `Enter` or the Spacebar to execute the command.
This process, as described in the reference, aims to consolidate the selected lines. For perpendicular lines meeting at a corner, the outcome might depend on the objects' initial type (Line, Polyline) and proximity.
## Understanding the Join Command with Perpendicular Lines
The `JOIN` command works best when:
* **Lines are Collinear:** Multiple lines lying on the same line segment can be joined into a single, longer line or polyline.
* **Objects are Touching:** Lines, arcs, and polylines whose endpoints meet can often be joined into a single, continuous polyline object.
When applying the `JOIN` command to two separate `Line` objects that are perpendicular and meet precisely at an endpoint, AutoCAD might convert them into a single `Polyline` object forming the corner. However, sometimes additional steps like converting to polylines first using the `PEDIT` command and its `Join` option are necessary, especially in older versions or for more complex scenarios. The simple "Type Join, Select Lines, Press Enter" method from the reference is the direct approach to attempt this consolidation.
## Why Join Lines?
Joining lines or segments into a single polyline is beneficial for:
* **Simplifying Drawings:** Reduces the number of objects.
* **Easier Editing:** A single polyline can be edited as one unit (e.g., offsetting, changing width).
* **Property Management:** Properties (layer, color, linetype) are applied to one object.
* **Compatibility:** Useful for commands that require polyline input.
## Alternative Approaches for Perpendicular Corners
While the `JOIN` command is the direct answer based on the reference, other AutoCAD methods are commonly used to create single polyline corners from perpendicular lines or geometry:
* **Using `FILLET` with Radius 0:** The `FILLET` command with a radius set to 0 can be used to trim or extend two lines until they meet at a sharp corner, forming a single entity if one is a polyline or converted into one.
* **Using `PEDIT` (Polyline Edit):** Convert the lines to polylines first (if they aren't already) using `PEDIT` > `Convert`, and then use the `PEDIT` > `Join` option. This is a robust method for joining various touching objects into a single polyline.
However, strictly following the provided reference, the method is simply:
| Command | Action |
| :------ | :----------------- |
| `JOIN` | Type into command line |
| Select | Choose the lines |
| `Enter` | Execute command |
This method attempts to join the selected objects according to AutoCAD's standard Join command behavior, which can result in a single polyline for perpendicular lines meeting at a point.
