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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:216CA1of4 GHM

Order: 19

Horizontal side: 216 Vertical side: 216

Elements: 4, 3√2, 4√2, 6, 8, 6√2, 8√2, 12, 28, 28√2, 40, 40√2, 74, 80, 68√2, 71√2, 74√2, 142, 108√2.

Code: 1425 0 74 1084 108 108 803 216 136 286 108 108 405 136 96 404 176 96 686 148 68 47 136 96 46 136 92 87 140 96 86 140 88 287 148 96 125 136 80 64 142 74 63 148 74 745 0 0 744 74 0 36 145 71 710 145 71

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
108√2
80
28√2
40
40√2
68√2
4
4√2
8
8√2
28
12
6√2
6
74
74√2
3√2
71√2