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圆心可变的扇形在x轴上滚动
Author:
赵林
GeoGebra
New Resources
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
兩位數加法
畫出對稱圖形
Discover Resources
高線
three circle touching each other
繪製平行四邊形
塗色練習
放射狀旋轉圖形(2)
Discover Topics
Cosine
Real Numbers
Power Functions
Arithmetic
Perimeter