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1A ROTATION
Author:
lo yat lung
GeoGebra
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三角函数 的副本
平行線的判定
直線的斜率：水平變化 & 鉛垂變化
常见四边形是否是双心四边形
比較五件物件的重量
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三角形重心(相關說明)
Introduction to Trigonometry from a Unit Circle
數學1
三角柱
閱讀量杯
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Means
Hyperbola
Piecewise Functions
Multiplication
Inequalities