Another reported view requires at least eight parts so that the three dimensions can intersect with right angles. Unlike a view centered on sheer number, this account explicitly depends on spatial arrangement.
A right angle is an angle of 90 degrees. The point is not merely to memorize the number eight, but to understand why the organization of three dimensions enters the proposed definition.
These views should be read as historical theological arguments about the nature of a body, not as predictions of particle physics.