五ご角かく錐すいじ字FuriganaMeanings1nounpentagonal pyramidA pyramid with a pentagonal base. Used in geometry and mathematics.五ご角かく錐すいの体たい積せきを計けい算さんする公こう式しきを覚おぼえていますか。Do you remember the formula for calculating the volume of a pentagonal pyramid?
