2012

You can also break selected objects at a single point with the Break at Point
tool.
Valid objects include lines, open polylines, and arcs. Closed objects such as
circles cannot be broken at a single point.
See also:
Break and Join Objects
BREP
Removes the history from 3D solids and composite solids, and associativity
from surfaces.
Summary
When a solid loses the history of the original parts from which it was created,
the original parts can no longer be selected and modified. BREP also removes
surface associativity. When a surface loses associativity it loses any
mathematical expressions or information about how the surface was created.
Commands | 157