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示例2
Author:
言小俞
GeoGebra
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撒针估算面积实验
平行線的判定
百分數及其應用
祖冲之的期望：内棋与外棋
垂直線的斜率
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Scheimpflug image
BkD_act15_02c
分數
認識分數
兩組對邊相等的四邊形（三年級）
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Algebra
Step Functions
Expected Value
Addition
Volume