A common way is by the mitre joint illustrated in the drawing.
The other groove is taken from the outer angle of the mitre joint inwards.
All these joints require accurate cutting and rather more of it than the mitre joint requires, but they are more easily glued up.
The end is then in the form of a bevel or mitre joint (Figure 50).
Fig. 2770 is a mitre joint, the only one serviceable to mouldings, pipes, and other curved pieces.