Radicals ( Radical73) three strokes in Kanji;
dimensional, e.g.
;
directional, e.g.
in 2-sided surface based computing, this character () represents 90° diff to Radical50;
e.g. frames in 2 planes; aspect ratio may begin;
logical, e.g.
in Kanji: this character () is always at left;
numerological, e.g.
3;
structural, e.g.
;