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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:78AB 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, 18√2, 27, 20√2, 31, 36, 27√2, 40, 30√2.

Code: 302 30 48 241 24 78 122 36 66 274 51 51 273 78 51 123 36 54 132 49 53 64 30 48 363 36 18 20 49 53 110 47 51 311 78 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
27√2
27
12
13√2
6√2
36
2√2
11√2
31
22
40
20√2
20
18
18√2