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将军饮马问题
Author:
陈宜红
GeoGebra
New Resources
平行線的判定
科赫雪花
第三周作业效果演示
双心四边形
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
到正四面體頂點的平方和
餘弦定理
火柴棒
Circle
动圆与两(相离)圆外切
Discover Topics
Congruence
Linear Equations
Reflection
Linear Functions
Vectors