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隔板法解组合问题
Author:
赵林
GeoGebra
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判斷球體
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
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正方形與正三角形
Fill the circle
Task 1: Rectangle Construction
平移法（二）
外心
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Circle
Linear Functions
Calculus
Rational Numbers
Root