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quadrilaterals 2
Author:
iedc
GeoGebra
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兩位數加法
兩組對邊相等的四邊形
兩位數除以一位數（二）
第八周作业
【案例】2018年全国1卷理科12题
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雙曲線
vector
正六角錐(旋轉，實體、透視)
量角器
gjc100a34 兩三角形重疊面積比
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Arithmetic Mean
Indefinite Integral
Reflection
Incircle or Inscribed Circle
Random Experiments