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對稱圖形
Author:
lily44559966
GeoGebra
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撒针估算面积实验
第八周作业
折扣
双心四边形
三角函数 的副本
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Quiz on Partial Variation 部分變：測驗
test
Test
我的第一个GGB绘本
翻牌游戏中的数学道理
Discover Topics
Inequalities
Cuboid
Derivative
Geometric Transformations
Cylinder