annular zone

英 美
  • 环带
  • annular adj.环状的;有环纹的
  • zone n.地域;地带;地区
    1. With the knowledge of Hindu trigonometric functions, two reconstructive methods, crescent and zone figure, were given by Bhaskara to prove the area formula of the sphere.
      摘要婆什伽罗利用他所熟知的印度三角函数知识,给出了球表面积公式的两种证明方法,即月牙形方法和环带形方法。