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Mason-Dixon Line

(Encyclopedia) Mason-Dixon Line, boundary between Pennsylvania and Maryland (running between lat. 39°43′26.3″N and lat. 39°43′17.6″N), surveyed by the English team of Charles Mason, a mathematician…

Oder-Neisse line

(Encyclopedia) Oder-Neisse line, frontier established in 1945 between Germany and Poland; it followed the Oder and W Neisse rivers from the Baltic Sea to the Czechoslovak border. The boundary,…

plane

(Encyclopedia) plane, in mathematics, flat surface of infinite extent but no thickness. An example of a plane, or more exactly of a bounded portion of a plane, is the surface forming one face, or…

A Boy's Will: A Line-storm Song

by Robert Frost Now Close the WindowsOctoberA Line-storm Song It is the autumnal mood with a difference. THE line-storm clouds fly tattered and swift, The road is forlorn all day,…

John Keats: Lines on the Mermaid Tavern

by John Keats Bards of passion and of mirthRobin HoodLines on the Mermaid Tavern Souls of poets dead and gone, What elysium have ye known, Happy field or mossy cavern, Choicer…

Geometry: Parallel Lines and Supplementary Angles

Parallel Lines and Supplementary AnglesGeometryProving Relationships Between LinesProofs Involving Perpendicular LinesLet's Get ParallelProofs About Alternate AnglesParallel Lines and Supplementary…