三棱锥锥体的一种，几何体，由四个三角形组成。固定底面时有一个顶点，不固定底面时有四个顶点。(正三棱锥不等同于正四面体，正四面体必须每个面都是正三角形）。
33层塔中的垂直阵列和三棱锥旋转结构给用户提供了各种内部交流空间和不同的空间体验。
Vertical array and rotation of triangular pyramid offer various inner community space and different experience to user at the 33 stories tower.
我们提出了圆加垂直弧段及三棱锥的三棱线这两种新的锥顶轨迹，并研究了以其进行精确重建所需的完全性条件。
In this paper two new cone vertex orbits, which are circle and arc and regular triangular pyramid lines, have been proposed and their complete conditions for exact reconstruction have been obtained.
四是数学能力系统。作者借助一个三棱锥图形，加深了对这些系统之间及其内部各要素之间关联性的认识和理解。
Whith the help of a triangular pyramid drawing, we are able to accelerate our understanding of the cognate interrelationship between the above systems and even between their internal basic elements.
应用推荐