Why is here

Numberform list 1. Numberblocks - The real Numberforms, existed from 2017. 2. Numberaboloes/Numberighttriangles - Numberforms made from 45-degree right triangles. 3. Numberares - Numberforms made out of "Numberblock Two-shaped" half-squares. 4. Numberdoms - Numberforms made out of 26° 34' right triangle = Half a domino, hence Numberdom as a name.