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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:78AA GHM

Order: 18

Horizontal side: 78 Vertical side: 78

Elements: 2√2, 6√2, 12, 11√2, 12√2, 18, 13√2, 20, 22, 24, 25, 18√2, 20√2, 29, 36, 40, 29√2, 30√2.

Code: 302 30 48 241 24 78 122 36 66 251 49 78 297 49 78 296 49 49 123 36 54 132 49 53 64 30 48 363 36 18 26 47 51 110 47 51 227 36 40 403 58 0 202 78 20 203 78 0 185 0 0 184 18 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)

30√2
24
12√2
25
29
29√2
12
13√2
6√2
36
2√2
11√2
22
40
20√2
20
18
18√2