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角的大小與角兩臂的長度有關？
Author:
cwc
GeoGebra
New Resources
錐體建築師
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球
兩位數加法
拼砌四邊形
Discover Resources
三角柱體的截面
Copy of 方格紙上畫四邊形
ABC 3
放射狀旋轉圖形(3)
橢圓2-四圓心近似法
Discover Topics
Quadratic Equations
Perimeter
Function Graph
Similar Triangles
Hypergeometric Distribution