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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:69AD GHM

Order: 18

Horizontal side: 69 Vertical side: 69

Elements: 2, 2√2, 4, 3√2, 4√2, 7, 7√2, 10, 14, 18, 14√2, 21, 28, 20√2, 21√2, 24√2, 31√2, 48.

Code: 487 0 69 283 48 41 142 62 55 141 62 69 72 69 62 71 69 69 316 38 31 200 20 41 181 38 41 107 38 41 42 42 27 43 42 23 32 45 24 240 45 24 24 40 21 23 42 21 215 0 0 214 21 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)

48
28
14√2
14
7√2
7
31√2
20√2
18
10
4√2
4
3√2
24√2
2√2
2
21
21√2