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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:74AO GHM

Order: 18

Horizontal side: 74 Vertical side: 74

Elements: 2√2, 4, 3√2, 4√2, 6, 6√2, 7√2, 9√2, 10√2, 11√2, 20, 17√2, 27, 20√2, 34, 27√2, 47, 37√2.

Code: 475 0 27 374 37 37 343 74 40 36 37 37 65 40 34 64 46 34 20 52 40 114 63 29 206 54 20 40 50 38 41 54 38 92 63 29 74 47 27 176 37 17 277 0 27 270 27 27 104 37 17 205 54 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)

47
37√2
34
3√2
6
6√2
2√2
11√2
20√2
4√2
4
9√2
7√2
17√2
27
27√2
10√2
20