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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:142AA GHM

Order: 18

Horizontal side: 142 Vertical side: 142

Elements: 12, 11√2, 12√2, 18, 22, 24, 18√2, 20√2, 22√2, 24√2, 40, 33√2, 36√2, 40√2, 62, 80, 60√2, 62√2.

Code: 807 0 142 620 80 142 621 142 142 186 0 62 127 18 80 120 30 80 364 66 44 206 82 60 407 102 80 406 102 40 247 18 68 240 42 68 185 0 44 600 82 60 222 22 22 334 33 11 223 22 0 112 33 11

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)

80
62√2
62
18√2
12
12√2
36√2
20√2
40
40√2
24
24√2
18
60√2
22√2
33√2
22
11√2