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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:78AL GHM

Order: 18

Horizontal side: 78 Vertical side: 78

Elements: 2, 2√2, 3√2, 8, 10, 12, 14, 10√2, 12√2, 14√2, 24, 18√2, 26, 24√2, 36, 40, 42, 39√2.

Code: 427 0 78 240 42 78 241 66 78 122 78 66 121 78 78 263 78 40 180 18 54 104 28 44 103 38 44 145 38 40 144 52 40 81 36 44 27 36 44 26 36 42 32 39 39 401 78 40 390 39 39 367 0 36

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)

42
24√2
24
12√2
12
26
18√2
10√2
10
14
14√2
8
2
2√2
3√2
40
39√2
36