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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:312AB GHM

Order: 19

Horizontal side: 312 Vertical side: 312

Elements: 8, 8√2, 20, 48, 39√2, 40√2, 58, 64, 48√2, 72, 78, 58√2, 64√2, 98, 78√2, 136, 117√2, 176, 156√2.

Code: 1765 0 136 1564 156 156 1176 195 195 390 195 195 201 176 156 582 234 98 581 234 156 782 312 78 1365 0 0 644 64 72 643 128 72 487 128 136 486 128 88 983 234 0 82 136 80 83 136 72 402 176 40 783 312 0 721 136 72

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)

176
156√2
117√2
39√2
20
58√2
58
78√2
136
64√2
64
48
48√2
98
8√2
8
40√2
78
72