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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:166AI4of4 GHM

Order: 19

Horizontal side: 166 Vertical side: 166

Elements: 9√2, 12√2, 18, 24, 18√2, 28, 24√2, 36, 28√2, 46, 48, 36√2, 56, 46√2, 72, 74, 55√2, 56√2, 74√2.

Code: 745 0 92 744 74 92 180 148 166 181 166 166 723 130 76 362 166 112 361 166 148 566 110 56 462 46 46 461 46 92 287 46 92 126 46 64 247 58 76 246 58 52 487 82 76 92 55 55 286 82 28 565 110 0 550 55 55

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)

74
74√2
18√2
18
72
36√2
36
56√2
46√2
46
28
12√2
24
24√2
48
9√2
28√2
56
55√2