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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:78AX GHM

Order: 18

Horizontal side: 78 Vertical side: 78

Elements: 1√2, 2, 5, 5√2, 9, 10, 11, 15, 12√2, 14√2, 24, 26, 27, 28, 26√2, 27√2, 51, 52.

Code: 525 0 26 511 51 78 277 51 78 276 51 51 122 63 39 113 63 28 155 63 24 16 51 27 27 52 28 283 54 0 142 68 14 91 63 28 265 0 0 264 26 0 57 63 24 56 63 19 107 68 24 243 78 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)

52
51
27
27√2
12√2
11
15
1√2
2
28
14√2
9
26
26√2
5
5√2
10
24