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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:74AF GHM

Order: 18

Horizontal side: 74 Vertical side: 74

Elements: 4, 3√2, 4√2, 6, 8, 6√2, 14, 10√2, 11√2, 14√2, 20, 18√2, 20√2, 22√2, 34, 40, 30√2, 34√2.

Code: 407 0 74 340 40 74 341 74 74 66 0 34 47 6 40 40 10 40 224 32 18 106 44 30 207 54 40 206 54 20 87 6 36 116 3 25 182 32 18 65 0 28 300 44 30 142 14 14 34 3 25 143 14 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
34√2
34
6√2
4
4√2
22√2
10√2
20
20√2
8
11√2
18√2
6
30√2
14√2
3√2
14