Wood Joints. The cut end of one board butts-up against the edge of another piece at a right angle. Without the use of wood joinery techniques, everything we make using wood would end up coming from a single piece.
This results in squared cornered that can be stabilized using wood glue. This type of joint is simply constructed by "butting" two pieces of lumber together at their edges. The cut end of one board butts-up against the edge of another piece at a right angle.
This is the fundamental shape of all woodworking (except lathe work, which is a woodworking art form all of its own).
Woodworkers have used it for many years.
This joint is simple and strong. Some joints involve carving channels into two different wood pieces so that they lock together, while others use fasteners like nails or screws to hold them in place. It works best if you want to connect to a piece of wood at a seamless right angle.