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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:55AA GHM

Order: 18

Horizontal side: 55 Vertical side: 55

Elements: 1√2, 4, 5, 4√2, 5√2, 8, 10, 13, 10√2, 17, 18, 13√2, 20, 22, 25, 20√2, 21√2, 25√2.

Code: 255 0 30 254 25 30 50 50 55 51 55 55 100 45 50 101 55 50 183 35 22 207 35 40 206 35 20 177 0 30 46 13 26 87 17 30 136 0 13 45 13 22 227 13 22 16 34 21 210 34 21 135 0 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)

25
25√2
5√2
5
10√2
10
18
20
20√2
17
4√2
8
13√2
4
22
1√2
21√2
13