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Author:uccke

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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
畫出對稱圖形
拼砌四邊形

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Relationships between chords and their distances from centre
波的干涉 Wave Interference
骨牌
微信公众号“sx880A8”第253期印度尼西亚国旗（Indonesia flag）
赋值保存法

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Step Functions
Tangent Line or Tangent
Isosceles Triangles
Orthocenter
Hypothesis Testing

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