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Author:
陈宜红
GeoGebra
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龙形曲线-分形龙2
科氏力 (Coriolis Force)
比較五件物件的重量
圓的基本性質
百分數及其應用
Discover Resources
四則運算
一組物件的幾分之幾
四邊形的特性
橢圓3--平行四邊形法
巧算周界
Discover Topics
Arithmetic Operations
Trapezoid
Circumcircle or Circumscribed Circle
Cuboid
Translation