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Author:
李擎阳
GeoGebra
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撒针估算面积实验
百分數及其應用
第八周作业3
双心四边形
第三周作业效果演示
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推移(x 方向)
解數學題目
sincos
平行線的截線性質
不存在的梯子
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General Quadrilateral
Right Triangles
Cube
Frequency Distribution
Multiplication