Square
From Encyclopedia of Mathematics - Reading time: 1 min
An equal-sided rectangle.
The square of a number $a$ is the product $a\cdot a=a^2$; so called because this product expresses the area of a square with side length $a$.
Comments[edit]
The expression "square" for $a\cdot a$ is (just as "cube" for $a\cdot a\cdot a$) a remnant of the geometric view on numbers of the old Greeks.
How to Cite This Entry: Square (Encyclopedia of Mathematics) | Licensed under CC BY-SA 3.0. Source: https://encyclopediaofmath.org/wiki/Square15 views | ↧ Download this article as ZWI file
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