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三角形性質--大角對大邊、小角對小邊
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陳信均
GeoGebra
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垂直線的斜率
圓周公式的應用
科氏力 (Coriolis Force)
常见四边形是否是双心四边形
平行線的斜率
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分數加法
Is this a prism 11
tube15240
GGB多页面案例
因數（1至48）
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Sequences and Series
Linear Functions
Calculus
Centroid or Barycenter
Cone