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Primitive Perfect Isosceles Right Triangled Square

Title: _d 19:210AU GHM

Order: 19

Horizontal side: 210 Vertical side: 210

Elements: 4, 4√2, 6, 8, 8√2, 12√2, 28, 31, 40, 31√2, 37√2, 40√2, 62, 68, 74, 68√2, 105, 142, 105√2.

Code: 1425 0 68 1054 105 105 1053 210 105 374 142 68 310 179 105 311 210 105 63 148 68 627 148 74 743 210 0 687 0 68 680 68 68 404 108 28 403 148 28 281 136 28 47 136 28 46 136 24 87 140 28 86 140 20 122 148 12

The properties below may precede order:side in a tiling's title:

Credit for Discovery

Just three people are credited with the discovery of Primitive Perfects:

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)

William T. Tutte (WTT, Canada, 1917-2002) (15:44AI, 17:136AJ and 19:56AJ only)

142
105√2
105
37√2
31√2
31
6
62
74
68
68√2
40√2
40
28
4
4√2
8
8√2
12√2