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In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices ABCD would be denoted
◻
{\displaystyle \square }
ABCD.
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◻
{\displaystyle \square }
ABCD.
View More On Wikipedia.org
