Derivative UltraPerfect Isosceles Right Triangled Square

Title: dp 16:60JA GHM

Order: 16

Horizontal side: 60 Vertical side: 60

Elements: 2√2, 5, 5√2, 7√2, 10, 9√2, 14, 10√2, 15, 18, 20, 16√2, 25, 35, 25√2, 30√2.

Code: 355 0 25 304 30 30 166 44 44 143 44 30 72 51 37 90 51 37 54 35 25 53 40 25 205 40 10 24 42 28 181 60 28 257 0 25 250 25 25 151 40 25 104 50 0 103 60 0

The properties below may precede order:side in a tiling's title:

• c = crossed. There is a tile-corner traversed by two lines. 18:48JB2of5 is the only known crossed DUIRTS of order < 19.
• d = double-pentagon patterned. Every such tiling is a subdivision of an instance of the same deformable tiling by two 45-90-90-90-225 pentagons with a shared side, four triangles and two pseudotriangles.
• e = elegant. No tile-corner is just a T-junction. Such tilings may be considered aesthetically pleasing. The only known elegant DUIRTS's of order < 19 are of order 18 and side 147.
• p/r/t = pseudotriangular/rectangular/triangular inclusion subdivided into at least 6/5/6 triangles respectively.

Credit for Discovery

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)