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Author:
航 杨
GeoGebra
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球體建築師
【案例】圆柱体内放置一个大球六个小球
兩位數加法
兩位數除以一位數（二）
三位數除以一位數（一）
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畢氏定理
橢圓與雙曲線折紙
同心圓
HW question locus 2
z20联盟数学考试第七题
Discover Topics
Quadrilaterals
Circumcircle or Circumscribed Circle
Rhombus
Percentages
Tangent Line or Tangent