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焦点弦3
Author:
liu
GeoGebra
New Resources
比較五件物件的重量
斐波那契螺旋弧线（表格法-可动态调节）
龙形曲线-分形龙2
第八周作业
三角函数 的副本
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Clock24hour
平行四邊形面積一
Activity 1
Copy of 以剪貼比較圖形大小 題1
动态曲线
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Isosceles Triangles
Equilateral Triangles
Vectors
Distributions
Sphere