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立體圓錐與斜切面關係
Author:
黃國斌
GeoGebra
New Resources
第八周作业
【案例】2018年全国1卷理科12题
拼砌四邊形
異分母分數減法
球體建築師
Discover Resources
earth
大無限圖
相同圖形的拼砌（有兩組平行線的四邊形）
Distributive Law of Multiplication 2 (乘法的分配率 2)
數學傳播39卷4期, 平面幾何公式思考
Discover Topics
Fractions
Subtraction
Upper and Lower Sum or Riemann Sum
Differential Calculus
Division