Why are dado sides not parallel?

Why are dado sides not parallel? dado slot Freud Dado set, 207 x 6-22 x 30 For table routers and sliding table saws slots from 6 - 22 mm dream set slot Essentially, it involves creating a slot or trench, known as a dado, in one piece of wood Another piece of wood is then cut to fit snugly into this slot,

dream set slot A dado is a slot, cut into a board, for the connection of another board at right angles It is a very common woodworking joinery technique for joining

efbet slot dado blade for a 1⁄4 Dadoes and grooves are both defined as a three-sided channel cut into a workpiece but a dado is cut across the grain of the wood and a