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勾股定理的证明:弦图面积平移法
Author:
李洋
GeoGebra
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盈利與虧蝕
撒针估算面积实验
百分數及其應用
活动三:应用性质
龙形曲线-分形龙2
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proof36 王宇揚
最簡分數
定義篇
拋物線四-平行四邊形法
旋轉橢圓
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Addition
Sphere
Percentages
Straight Lines
Polygons