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Author:
賴鍵維
GeoGebra
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兩組對邊相等的四邊形
異分母分數減法
【案例】2013年安徽高考15题
四邉形 (四年級) 教師版
球体的体积推导（优化版）
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畢氏定理動態證明(歐基里得，平形四邊形等面積，應用polyline)
proof 64 潘研
proof3(1-1)吳奕杰
Activity 1
结果10以内加法
Discover Topics
Frequency Distribution
Tangent Line or Tangent
Variance
Indefinite Integral
Reflection