truncated cube
construction
triangular
superpose
regular icosahedron
construct
square
shaped
lensoidal
photostatically
quadratic
axis of symmetry
presymplectic
external angle
triangularity
exterior angle
topomorphological
truncated tetrahedron
Euclidian space
conicohemispherical
plane geometry
conic section
plane of symmetry
Georg Friedrich Bernhard Riemann
circumconics
quadrangularly
conic
Bernhard Riemann
planal
roughcast
regular tetrahedron
fractal geometry
metageometric
cubangular
Riemann
conoid
intercone
geometric
hypergeometry
morphology
cubiform
primitive
spherical trigonometry