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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:55AF GHM

Order: 18

Horizontal side: 55 Vertical side: 55

Elements: 2, 2√2, 4, 3√2, 5, 4√2, 7, 8, 10√2, 15, 11√2, 14√2, 20, 15√2, 25, 20√2, 30, 40.

Code: 407 0 55 303 40 25 152 55 40 151 55 55 206 35 20 106 0 15 112 21 14 251 35 25 57 35 25 205 35 0 85 0 7 140 21 14 75 0 0 44 4 3 43 8 3 22 10 5 23 10 3 34 7 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)

40
30
15√2
15
20√2
10√2
11√2
25
5
20
8
14√2
7
4√2
4
2√2
2
3√2