Square bututu sunan ne na square bututu da rectangular bututu, wato, karfe bututu tare da daidai da kuma m gefen tsawo. An yi na birgima tsiri karfe bayan aiwatar jiyya. Gabaɗaya, karfen tsiri yana buɗewa, an daidaita shi, an gurɓata shi da walda shi don samar da bututu mai zagaye, sannan a naɗe shi cikin bututu mai murabba'i, ...
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