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任务10：黄金螺线与向日葵
Author:
陈丽婷
GeoGebra
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拼砌四邊形
【案例】2018年全国1卷理科12题
兩位數加法
算柱 (兩位數)
画直线等分三角形的面积
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初三作业
ABC 2
External tangent
放射狀旋轉圖形(3)
根據百分率找數量（一）: 例2的副本
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Equilateral Triangles
Derivative
Incircle or Inscribed Circle
Quadrilaterals
Line Segment