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所谓直角四面体 (也叫直角三棱锥 ) ,是指由同一点出发的 ,两两互相垂直的三条棱所构成的四面体 .其中两两垂直的三条棱叫直角棱 ,两两垂直的三个面叫直角面 ,另一个面相对来说叫做斜面 .本文旨在通过对直角四面体的多种性质的挖掘 ,揭示直角四面体的结构特征 ,展示思维过程 .
The so-called right-angled tetrahedron (also called a right-angled triangular pyramid) refers to the tetrahedron formed by the same point and two mutually perpendicular three-sided ribs. Among them, two or three vertical three-sided ribs are called right-angled edges, and two vertical two The surface is called a right-angle surface, and the other surface is called a slope. This paper aims to reveal the structure characteristics of a right-angled tetrahedron and reveal the thinking process through the exploration of various properties of the right-angled tetrahedron.