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翰林數學_2下_CH3-1_多邊形的內角和
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翰林數學
GeoGebra
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斜率的值
直線的斜率：水平變化 & 鉛垂變化
龙形曲线-分形龙2
折扣
盈利與虧蝕
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折射率的定義
圓周 (圖形B)
愛心
百分數化分數
數線
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Tangent Line or Tangent
Kite
Equations
Equilateral Triangles
Probability