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乘法口诀
Author:
朱亮
GeoGebra
New Resources
漂亮的摇摆曲线
圓周公式的應用
球体的体积推导（优化版）
祖冲之的期望：内棋与外棋
平行線的斜率
Discover Resources
初中八年级奥数：面积与面积法
不規則區域著色
Trigonometry
分水問題
任意凸多边形的滚动
Discover Topics
Linear Programming or Linear Optimization
Arithmetic
Arithmetic Mean
Area
Median Line