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Author:
chen mingchuan
GeoGebra
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平行線的判定
比較五件物件的重量
撒针估算面积实验
科赫雪花
常见四边形是否是双心四边形
Discover Resources
方格紙上畫長方形2
圆锥曲线定义的拓展（卡西尼卵形线）
作垂线或平行线
模板
对称拼图游戏
Discover Topics
Function Graph
Square
Multiplication
Statistical Characteristics
Linear Regression