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根據百分率找數量（一）: 例3的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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三角函数 的副本
第八周作业3
直線的斜率
圓的切線方程
常见四边形是否是双心四边形
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使用中
Slope of a St. Line (formula)
GGB5---3D功能
三棱柱
文創花燈
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Matrices
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