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光的折射（光线自右下向左上）
Author:
樊双平
GeoGebra
New Resources
判斷球體
四邊形的特性
球体的体积推导
GeoGebra笔记功能体验课件
兩組對邊相等和有直角的四邊形
Discover Resources
【練習】資料整理與統計圖表─統計量值
Subdivision
剪刀石頭布
阿基米德多面體
concyclic by Mr LO WY
Discover Topics
Geometric Mean
Incircle or Inscribed Circle
Unit Circle
Angles
Plane Figures or Shapes