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Author:
CIY
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
第八周作业
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
祖冲之的期望：内棋与外棋
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切割圓面積
Clock
RECTANGLE
碎形三角形
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Linear Equations
Multiplication
Perimeter
Fractal Geometry
Plane Figures or Shapes