Non-Euclidean geometry that are both perpendicular to a third line: Euclidean geometry, named after the Greek mathematician Euclid, includes some of the oldest known mathematics, and geometries that deviated from this were not widely accepted as legitimate until the 19th century. The debate that eventually led to the discovery of the non-Euclidean geometries began almost as soon as Euclid's work "Elements" was written. In the "Elements", Euclid began with a limited number of assumptions (23 definitions, five common notions, and five postulates) and sought to prove all the other results (propositions) in the work. The most notorious of the postulates is often
During the Reign of the Queen of Persia teens, the second regresses back to their childhood, and the third see the sale of the family farm and the dispersal of the family. The book drew comparisons to the works of Anne Tyler, Marilynne Robinson, Douglas Unger and Susan Engberg. During the Reign of the Queen of Persia During the Reign of the Queen of Persia is the first novel by American author Joan Chase. On its publication in 1983 it won the Hemingway Foundation/PEN Award. The story is told from the perspective of the four granddaughters of the "Queen of Persia", an Ohio farmwife, during the 1950s. The