2D shapes have length, breadth and have area but no depth. Here are
some 2D shapes: triangle, square, pentagon, hexagon, heptagon,
octagon, nonagon, decagon, hendecagon and dodecagon.
3D shapes have length, and width, all shapes with those are called
solids. Here are some solids: pyramid, cylinder, cone, sphere,
rectangular prism, icosahedron and net which is a flat pattern that
when folded a solid shape.
Symmetry means to measure together. Symmetry is always the same
on each side.
Phi/golden ratio is an irrational mathematical concept. It’s the 21st
letter in the Greek alphabet. It is usually pronounced fy or fai. Its
number is 1.6180339887498948482058634
Patterns repeat in a predictable pattern. There are many types of
patterns. (e.g. visual)
http://fc.gecdsb.on.ca/~jason.deluca/?OpenItemURL=S03965290
3d shapes
http://www.shodor.org/interactivate/discussions/SymmetryInTessellati/
symmetry
http://teams.as.edu.au/groups/middleschool/wiki/2ec87/http://www.diatribe.co.nz/viewtopic.php?t=1
http://www.diatribe.co.nz/viewtopic.php?t=1470 ph
http://www.valdosta.edu/~cmmorrison/ebook4.html pattern