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waaachen
Author:
陳兪宏
吳孟哲老師做圖法
GeoGebra
New Resources
拼砌四邊形
球体的体积推导（优化版）
球体的体积推导
球體建築師
兩位數除以一位數（一）
Discover Resources
旋轉動畫
六面體與八面體
Larry's Clock
雙曲線1-焦點法
圆与圆的位置关系
Discover Topics
Arithmetic Operations
Secant Line or Secant
Translation
Median Line
Vectors