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學習活動四平行線法的原理
Author:
CIY
GeoGebra
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【案例】2018年全国1卷理科12题
球体的体积推导(优化版)
錐體建築師
兩位數加法
四邊形的特性
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折扣 例2
邊長與三角形(一)
ptccs2new3
伍四红 圆与正方形 面积同周长比较
圓內接四邊形的圓周角
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Functions
Circumcircle or Circumscribed Circle
Dilation
Volume
Reflection