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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:70AT GHM

Order: 18

Horizontal side: 70 Vertical side: 70

Elements: 2, 3√2, 6, 6√2, 7√2, 12, 14, 18, 14√2, 20, 15√2, 28, 20√2, 21√2, 30, 22√2, 28√2, 42.

Code: 427 0 70 220 42 70 281 70 70 200 20 48 201 40 48 187 40 48 36 55 45 67 58 48 60 64 48 150 55 45 121 70 42 25 40 28 301 70 30 142 14 14 214 21 7 280 42 28 143 14 0 72 21 7

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)

42
22√2
28
20√2
20
18
3√2
6
6√2
15√2
12
2
30
14√2
21√2
28√2
14
7√2