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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:156AC GHM

Order: 18

Horizontal side: 156 Vertical side: 156

Elements: 1√2, 2, 18, 14√2, 18√2, 28, 23√2, 37, 38, 39, 28√2, 38√2, 39√2, 40√2, 76, 78, 80, 78√2.

Code: 807 0 156 386 42 118 767 80 156 786 78 78 286 14 90 385 42 80 146 0 76 285 14 62 185 42 62 184 60 62 406 38 40 27 78 80 785 78 0 375 0 39 234 37 39 10 38 40 397 0 39 390 39 39

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)

80
38√2
76
78√2
28√2
38
14√2
28
18
18√2
40√2
2
78
37
23√2
1√2
39
39√2