- Orokorrak
- es diagonal
- eu diagonal
- fr diagonale
diagonal
- ca diagonal f
- de Kreuzungsstrasse f
- es diagonal f
- eu diagonal
- fr diagonale f
- gl diagonal f
- it diagonale f
- pt diagnóstico m
diagonal
Diagonal
In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge. Informally, any sloping line is called diagonal. The word diagonal derives from the ancient Greek διαγώνιος diagonios,[1] "from angle to angle" (from διά- dia-, "through", "across" and γωνία gonia, "angle", related to gony "knee"); it was used by both Strabo[2] and Euclid[3] to refer to a line connecting two vertices of a rhombus or cuboid,[4] and later adopted into Latin as diagonus ("slanting line").
In matrix algebra, the diagonal of a square matrix consists of the entries on the line from the top left corner to the bottom right corner. There are also many other non-mathematical uses.
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