出典:Wiktionary
出典:『Wiktionary』 (2026/04/11 00:46 UTC 版)
Borrowed from Middle French, from Old French, from Medieval Latin or Late Latin rectangulum (“right angle”), from Latin rectus (“right”) + angulus (“an angle”).
rectangle (plural rectangles)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/21 05:08 UTC 版)
In Euclidean plane geometry, a rectangle is any quadrilateral with four right angles. The term "oblong" is occasionally used to refer to a non-square rectangle. A rectangle with vertices ABCD would be denoted as ABCD.
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