Squaring.net >> IRTS >> PPIRTSS >> Order 18

Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:72AQ GHM

Order: 18

Horizontal side: 72 Vertical side: 72

Elements: 1, 7, 5√2, 8, 10, 8√2, 10√2, 15, 16, 20, 21, 15√2, 16√2, 20√2, 21√2, 36, 31√2, 36√2.

Code: 365 0 36 364 36 36 316 41 41 50 41 41 155 0 21 154 15 21 86 22 28 167 30 36 160 46 36 73 22 21 85 22 20 217 0 21 210 21 21 11 22 21 204 42 0 203 62 0 102 72 10 103 72 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
31√2
5√2
15
15√2
8√2
16
16√2
7
8
21
21√2
1
20√2
20
10√2
10