apical angle

例句：

1. 1. The apex angle of the cone is the sharpest part.
   圆锥的顶点角度是尖锐的部分。
2. 2.In physics, the apex angle of a triangle is the angle between its sides.
   在物理学中，三角形的顶点角度是其边之间的角。
3. 3. The apex angle of the roof was too steep for the building's design.
   屋顶的顶点角度对于建筑的设计来说太陡了。