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封閉區域填色
Author:
葉冠和
GeoGebra
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【案例】2018年全国1卷理科12题
球體建築師
拼砌四邊形
四邊形的特性
找出對稱軸
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優良作品1(昀潔)
夜市麻將
立體圖形的特徵
CBTL_science_rcpet
中国节灯笼
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Equations
Coordinates
Conditional Probability
Geometric Mean
Secant Line or Secant