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Primitive Perfect Isosceles Right Triangled Square

Title: _r 18:72AN4of4 GHM

Order: 18

Horizontal side: 72 Vertical side: 72

Elements: 4√2, 8, 10, 8√2, 12, 9√2, 10√2, 16, 18, 20, 16√2, 24, 18√2, 26, 20√2, 36, 27√2, 36√2.

Code: 365 0 36 364 36 36 276 45 45 90 45 45 267 0 36 160 26 36 161 42 36 82 50 28 121 54 36 182 72 18 83 50 20 42 54 24 243 54 0 106 0 10 205 10 0 204 30 0 183 72 0 105 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)

36
36√2
27√2
9√2
26
16√2
16
8√2
12
18√2
8
4√2
24
10√2
20
20√2
18
10