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Primitive Perfect Isosceles Right Triangled Square

Title: _r 18:77AA1of4 GHM

Order: 18

Horizontal side: 77 Vertical side: 77

Elements: 2√2, 4√2, 5√2, 10, 10√2, 15, 19, 20, 15√2, 23, 27, 30, 31, 23√2, 35, 25√2, 27√2, 31√2.

Code: 315 0 46 314 31 46 50 62 77 151 77 77 303 57 42 107 57 72 100 67 72 207 57 62 353 77 27 232 23 23 231 23 46 195 23 27 44 27 42 154 42 27 22 25 25 274 50 0 273 77 0 250 25 25

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)

31
31√2
5√2
15
30
10
10√2
20
35
23√2
23
19
4√2
15√2
2√2
27√2
27
25√2