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Author:
Mr CHANG
GeoGebra
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常见四边形是否是双心四边形
直線的斜率：水平變化 & 鉛垂變化
第八周作业1
盈利與虧蝕
百分數及其應用
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「分點」平行四邊形
優良作品5(盈彤)
兩面角
對稱圖形
圆锥曲线的第二定义
Discover Topics
Integers
Curve Sketching
Plane Figures or Shapes
Straight Lines
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