Bible Encyclopedias
Diagonal
1911 Encyclopedia Britannica
(Gr. Stet, through,ywvia, a corner), in geometry, a line joining the intersections of two pairs of sides of a rectilinear figure.
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Diagonal'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/d/diagonal.html. 1910.