Note the thumbnail below is a degraded version of the actual image which is much sharper. A Necker cube is basically a wireframe drawing of a six-sided cube such that it has no perspective as to whether you're looking at it from the top or from the bottom. This is an example of two exactly identical necker cubes, the one on the left showing an intermediate object going in "down from the top" while the one on the right shows the object going in "up from the bottom" which shows how the image can change its perspective simply by changing which face (front or back) appears behind the intervening object. cube necker cube optical illusion 2 Necker Cubes
Paper model of a cube. Modelo de papel de um cubo. paper model cube mathematics Paper model of a cube
A set of 3 Geometry shapes floating in mid-air on a metallic platform. Drawn with Inkscape. geometry geometric shape Geometry 2
An example of a necker cube and an Impossible cube (one arm runs across the other but is still straight, which can't happen in 3D; it's an optical illusion). cube necker cube optical illusion Necker cube and impossible cube
The difference of two cubes. Typeface is Tuffy (public domain, created by Thatcher Ulrich) from openfontlibrary.org cube cub difference Difference of Two Cubes
Wireframe models of a cube, cone, cylinder, sphere, and torus. cube cone cylinder Wireframe 3D Mesh Primitives
A set of 3 Geometric shapes floating in mid-air. Drawn with Inkscape. geometry geometric shape Geometry 3
A set of 3 Geometry Shapes floating in mid-air with a metallic floor and a metallic graph in the background. Drawn with Inkscape. geometry geometric shape Geometry 4
a bunch of cubes from blender that I then traced and cleaned up in inkscape, might save someone some time at some point. cub geometry outline Simple Grey Cubes
Paper model of a tetrahedron. Modelo de papel de um tetraedro. paper model polyhedra mathematics Paper model of a tetrahedron
A set of 3 Geometry Shapes floating in mid-air. Drawn with Inkscape. geometry geometric shape Geometry 1
A parabola on a Cartesian coordinate grid. Typeface is Tuffy (public domain, created by Thatcher Ulrich) from openfontlibrary.org parabola math mathematics Parabola