Square, n = 14 record

A = 0.024303833806

full precision

Exact value of the published coordinate literals: 0.024303833806

4 minimal triangles in 1 congruence classes, colored by class.

Symmetry

2-fold dihedral symmetry (group D2, order 4). (Friedman's page says: vertically and horizontally symmetric.)

4 triangles tied (within relative 10⁻⁹) at the minimal area:

	count	side lengths	triangles (point indices)
	4	`0.2768 · 0.5721 · 0.8399`	(4,11,13) (5,10,12) (6,9,13) (7,8,12)

Found by Mark Beyleveld, August 2006.
Coordinates from spiralulam/heilbronn (MIT): spiralulam/heilbronn config_n14.json — Beyleveld (unpublished).
Verified in exact arithmetic: all 364 triples enumerated, 4 tied at the minimum.
Friedman's page lists: A = .02430+.