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Primitive Perfect Isosceles Right Triangled Square

Title: _d 19:210AT GHM

Order: 19

Horizontal side: 210 Vertical side: 210

Elements: 4, 4√2, 6, 8, 12, 16, 20√2, 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 28 204 128 8 163 148 12 40 132 12 41 136 12 127 136 12 81 136 8

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
20√2
16
4√2
4
12
8