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纏繞畫
Author:
洪源朗
GeoGebra
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【案例】2013年安徽高考15题
画直线等分三角形的面积
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
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賺賠：例3
exponential function translation
Spherical Spiral
test
三視圖01
Discover Topics
Pie Chart or Circle Chart
Similarity Transformation or Similarity
General Quadrilateral
Perimeter
Quadratic Equations