Triangle Tilings and Polyhedra Triangle Tiling is the process of taking many copies of a single triangle and laying them next to each other to fill an area. Experiment with the different patterns you can create with flat tiles, or see how you can make polyhedra out of bent triangles with the .

Symmetry and Tiling Symmetry is everywhere in art, nature and geometry! Learn about periodic and nonperiodic tilings. Watch animations explaining the 17 different kinds of wallpaper symmetry, or use to make your own patterns.

Tetrahedral Puzzles Did you know that all convex polyhedra can be decomposed (cut up) into tetrahedra? Tetrahedra are 3-dimensional pyramids with only four faces, the fewest faces possible for any polyhedron. Learn about tetrahedral decompositions by making your own tetrahedra puzzle pieces out of construction paper and put them together to make more complicated polyhedra.

Fractal Art Generate your own digital fractal art by using the Science U Fractal Color Scheme Chooser applet. Choose from twenty hi-res fractal templates, and express yourself. Use them for you computer desktop, in custom print projects like cards and t-shirts, or send to friends.