角かく錐すい台だい

noun

truncated pyramid

A geometric solid formed by cutting off the top of a pyramid with a plane parallel to the base. Used in mathematics and technical contexts.

• 角かく錐すい台だいの体たい積せきを求もとめる公こう式しきを覚おぼえていますか。

  Do you remember the formula for finding the volume of a truncated pyramid?