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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:90AY GHM

Order: 19

Horizontal side: 90 Vertical side: 90

Elements: 3√2, 4√2, 8, 8√2, 14, 16, 18, 20, 22, 24, 18√2, 20√2, 30, 24√2, 27√2, 40, 42, 30√2, 60.

Code: 605 0 30 421 42 90 245 42 66 244 66 66 276 63 63 187 42 66 186 42 48 225 60 44 34 63 63 147 60 44 46 70 40 87 74 44 80 82 44 403 70 0 202 90 20 161 90 36 305 0 0 304 30 0 203 90 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)

60
42
24
24√2
27√2
18
18√2
22
3√2
14
4√2
8
8√2
40
20√2
16
30
30√2
20