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Author:
何美华
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
比較五件物件的重量
圓的基本性質
百分數及其應用
龙形曲线-分形龙
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函數
美國隊長
三節棍1060317
Trigonometric Ratios of Any Angle
試算表2
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Incircle or Inscribed Circle
Piecewise Functions
Histogram
Arithmetic Operations
Pyramid