πολύεδρον app for iPhone and iPad

πολύεδρον 2D
¡¡the world’s most sophisticated polyhedron 2D viewer!!

explore 2D tessellations in elliptic/parabolic/hyperbolic space
select any trigonal symmetry group, based on 3 trigonal vertices
set polygonal edge lengths, using barycentric trigonal co·ordinates
select stereographic/gnomonic/orthogonal 3D▻2D projection
translate/rotate in 2D
choose your favorite colors & elements (vertices, edges, faces)
¡¡draw pretty pictures!!
open/save/print your favorite configurations
for menu options, move the necklace string & beads

for high school & college math teachers:
instead of lecturing on tessellations & symmetry groups
let students play with this app for active learning seminar

for k-12 math teachers:
even young kids can (intuitively) understand symmetry groups
print bare outline pictures (edges only) for students to color by hand

elizabeth r chen, PhD
mathe·magician