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S4E16 SSA的探究
Author:
宋晓燕
GeoGebra
New Resources
双心四边形
折扣
龙形曲线-分形龙
祖冲之的期望：内棋与外棋
撒针估算面积实验
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轨迹2016.4.16
三度空間中的長方體
Distributive Law of Multiplication 2 (乘法的分配率 2)
正三角形繞正方形旋轉
平行四边形变形
Discover Topics
Probability
Congruence
Prism
Rectangle
Perimeter