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Author:
chen mingchuan
GeoGebra
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判斷球體
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
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數字組合
线段的最值
勾股定理III 基於歐基里德(Euclid)的證明
Copy of Multiplication of polynomials 2 (多項式的乘法 2)
S3 WS4.3 Q04(3D圖)
Discover Topics
Quadratic Equations
Calculus
Mathematics
Cosine
Tangent Line or Tangent