You can break an object into two objects with or without a gap between them. You can also join objects to make a single object.
Use BREAK to create a gap in an object, resulting in two objects with a gap between them. BREAK is often used to create space for block or text.

To break an object without creating a gap, specify both break points at the same location. The fastest way to do this is to enter @0,0 at the prompt for the second point.
You can create breaks in most geometric objects except
Use JOIN to combine similar objects into a single object. You can also create complete circles and ellipses from arcs and elliptical arcs. You can join
The object to which you want to join similar objects is called a source object. Objects to be joined must be located in the same plane. Additional restrictions for each type of objects are described in the JOIN command.