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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:180BM GHM

Order: 19

Horizontal side: 180 Vertical side: 180

Elements: 8, 8√2, 16, 24, 21√2, 30, 32, 40, 42, 36√2, 54, 40√2, 42√2, 60, 54√2, 80, 60√2, 63√2, 120.

Code: 1205 0 60 634 63 117 426 84 138 547 126 180 546 126 126 216 63 117 425 84 96 305 126 96 364 120 60 163 156 80 245 156 72 803 140 0 402 180 40 84 148 72 83 156 72 321 180 72 605 0 0 604 60 0 403 180 0

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)

120
63√2
42√2
54
54√2
21√2
42
30
36√2
16
24
80
40√2
8√2
8
32
60
60√2
40