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

Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:80AU GHM

Order: 18

Horizontal side: 80 Vertical side: 80

Elements: 4, 5, 5√2, 10, 12, 10√2, 15, 16, 12√2, 20, 15√2, 16√2, 28, 20√2, 25√2, 40, 50, 40√2.

Code: 505 0 30 404 40 40 283 80 52 120 52 52 121 64 52 167 64 52 166 64 36 104 50 30 403 60 0 202 80 20 41 64 40 152 15 15 254 25 5 203 80 0 153 15 0 105 15 5 55 15 0 54 20 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)

50
40√2
28
12√2
12
16
16√2
10√2
40
20√2
4
15√2
25√2
20
15
10
5
5√2