(1) Horizontally elongated surfaces
(2) Elongated surfaces with two short sides convex or concave
(3) Quadrilaterals containing one or more letters
(5) Quadrilateral figures with one or more convex or concave sides -- Note: Not including elongated surfaces with one or more convex or concave sides (25.3.1).
(6) Two quadrilaterals, one inside the other
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