Applet below shows cross sections by parallel hyperplanes of 720-cells and 1200-cells polytopes built of congruent bipyramids. Press '1200 cells' or '720 cells' to change the pictures. See also: remarks about 1200-cells and 720-cells polytopes built of congruent bipyramids..

Warning: Computer must download about 200 kB of data for each polytope for an applet to be fully operational.