geometrical center

例句：

1. 1.The geometric center of the circle is at the point where the diameter intersects the circumference.
   圆的几何中心是直径与周长相交的点。
2. 2. When calculating the area of a triangle, the geometric center is the point where the bases and altitudes meet.
   计算三角形面积时，几何中心是指底边和高相交的点。
3. 3.In physics, the geometric center is used to determine the center of mass for a system of objects.
   在物理学中，几何中心用于确定物体系统的质量中心。