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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:138BT1of4 GHM

Order: 19

Horizontal side: 138 Vertical side: 138

Elements: 4√2, 5√2, 8, 10, 10√2, 15, 20, 15√2, 23, 19√2, 30, 31, 38, 46, 54, 46√2, 69, 92, 69√2.

Code: 925 0 46 694 69 69 693 138 69 231 92 69 317 92 69 50 123 69 151 138 69 303 118 34 107 118 64 100 128 64 207 118 54 543 138 0 465 0 0 464 46 0 83 92 38 383 84 0 192 103 19 44 88 34 154 103 19

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)

92
69√2
69
23
31
5√2
15
30
10
10√2
20
54
46
46√2
8
38
19√2
4√2
15√2