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过圆上一点作切线，三步
Author:
u.jianwang
GeoGebra
New Resources
第八周作业
算柱 (兩位數)
畫出對稱圖形
直角坐標平面上的旋轉變換
【案例】圆柱体内放置一个大球六个小球
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三節棍
分數與小數
乘加挑戰題
圓的面積的副本
劉徽的「割圓術」 的複本
Discover Topics
Integral Calculus
Geometric Mean
Curve Sketching
Set Theory
Symmetry