equilateral triangle, regular pentagon, regular hexagon, etc. = cibypitkubli, mumpitkubli, xavypitkubli ...
circle = cuktai
line = linji
point = mokca
x1 is a point/instant/moment (0-dimensional shape/form) in/on/at time/place x2.
x1 is a line/among lines (1-dimensional shape/form) defined by set of points x2.
t1=c1 is a circle.
pirmidi
x-axis, y-axis, z-axis = pavromli'i, relromli'i, cibromli'i