Polygons

Concave - Convex

Triangle

Square

Pentagon

Hexagon

Heptagon

Octagon

Nonagon

Decagon

Undecagon

Dodecagon

Citations

•http://images9.cafepress.com/product/44613259v2_480x480_Front_Color-BlackWhite.jpg

(heptagon)•http://www.signmonster.com/catalog/images/D9-2S_LG.jpg (square)•http://hotmommas.files.wordpress.com/2009/11/stop-sign.jpg (octagon)•http://threesixty360.files.wordpress.com/2008/07/glass-hexagon.jpg (hexagon)•http://flatfiles.pierogi2000.com/ffimages/870.jpg (nonagon)•http://www.pooltableplans.com/10Tabouret.jpg (decagon)•http://www.mathsteacher.com.au/year7/ch09_polygons/05_polygon/Image11206.gif (polygons)•http://t2.gstatic.com/images?q=tbn:ZZpeMxLZhWCtEM:http://www.gizmodo.com/gadgets/images/abit_undecagon.jpg (undecagon)•http://weblogs.dailypress.com/news/local/military/blog/pentagon2.jpg (pentagon)•http://www.fleur-newyork.com/cat_files/5-93.jpg (dodecagon)•http://www.exchange3d.com/cubecart/images/uploads/aff186/Yield.jpg (triangle)•http://www.emanueleferonato.com/images/convex_concave.png (concave - convex)