Hendecagon Hendecagon In geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon. (The name "hendecagon", from Greek "hendeka" "eleven" and "gon–" "corner", is often preferred to the hybrid "undecagon", whose first part is formed from Latin "undecim" "eleven".) A "regular hendecagon" is represented by Schläfli symbol {11}. A regular hendecagon has internal angles of 147.27 degrees (=147 formula_1 degrees). The area of a regular hendecagon with side length "a" is given by As 11 is not a Fermat prime, the regular hendecagon is not constructible with compass and straightedge. Because 11 is not a Pierpont prime, construction
Hampton Sides Hampton Sides (Wade) Hampton Sides (born 1962) is an American historian, author and journalist. He is the author of "Americana," "Hellhound on His Trail," "Ghost Soldiers," "Blood and Thunder," and other bestselling works of narrative history and literary non-fiction. Sides is editor-at-large for "Outside" magazine and has written for such periodicals as "National Geographic", "The New Yorker", "Esquire", "Men's Journal", and "The Washington Post". His magazine work, collected in numerous published anthologies, has been twice nominated for National Magazine Awards for feature writing. A native of Memphis, Sides attended PDS Memphis and Memphis University School, and graduated from Yale with