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volume of tetrahedron and parallelepiped
Author:
johnmayhk
GeoGebra
New Resources
龙形曲线-分形龙
撒针估算面积实验
斜率的值
祖冲之的期望：内棋与外棋
圓的切線方程
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勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
Quiz on Solving Quadratic Inequalities 解二次不等式：測驗 (v2018)
Distance(距離公式)
椭圆两个焦点与椭圆上点的连线
垂心
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Exponent
Natural Numbers
Hypothesis Testing
Parallelogram
Plane Figures or Shapes