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错觉图形-内凹的正方形
Author:
马宁
GeoGebra
New Resources
畫出對稱圖形
兩位數加法
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
【案例】2018年全国1卷理科12题
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分數與小數
中國火柴遊戲一
巧算周界
力的拆解
Copy of 平行四邊形的面積
Discover Topics
Planes
Cube
Conic Sections
Square
Probability