square sat

This picture of the pyramid of satellite by
girl 4 islam

the red square was a space tessaract

Red Square nebula @ BB (Boing Boing)

against :


a 2D projection of 3D objects which are projects of the 4D analog to the cube - Based on hypercube.c by Jamie Zawinski @ Paul's Stuff

magic

This is my 119^th post and I prepared a favorite magic square image from XL.

De Gua 1

De Gua's theorem is a generalization of the Pythagorean theorem to three dimensions and named for Jean Paul de Gua de Malves. If a tetrahedron has a right angle corner (a corner like a cube), then the square of the area of the face opposite the right angle corner is the sum of the squares of the areas of the other three faces.
Just see WP, nothing to add for now.