Seitenwinkel
Seitenwinkel is a German term meaning "side angle." It can refer to different concepts depending on context and is not a single, widely standardized term. In geometry, while not a common label in modern texts, Seitenwinkel has appeared in some older or regionally oriented sources to denote the angle formed by two sides of a polygon at a common vertex. In most contemporary mathematical language this angle is described as the interior angle or as the angle between two lines, rather than as a Seitenwinkel. In architecture, surveying, and engineering, the phrase may be used descriptively to indicate the angular relationship of a structural side to a reference line or plane, for example the Seitenwinkel between a side surface and a baseline. The precise interpretation is therefore context dependent and can vary by author or field.
As a place name, Seitenwinkel may occur in historical records or as a local designation in German-speaking