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GeoGebra
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转盘
Author:
许业成
GeoGebra
New Resources
讀磅
画直线等分三角形的面积
球体的体积推导（优化版）
漂亮的摇摆曲线
直線的斜率
Discover Resources
電流急急棒棒
椭圆的两条垂直切线的交点轨迹
Copy of 分數與小數
七巧板的副本
椭圆的光学性质
Discover Topics
Set Theory
Logarithm
Ellipse
Histogram
Dilation