Ninu jiometri, a alopomeji tabi onilopomeji je elegbemerin deede . O tumosi pe o ni egbe merin didogba ati igun merin didogba (90-iyi igun, tabi igun gboro). A square with vertices ABCD would be denoted ◻ {\displaystyle \square } ABCD Weisstein, Eric W. "Square." From MathWorld--A Wolfram Web Resource.