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线段旋转扫过面积
Author:
王阳
GeoGebra
New Resources
近似值：有效數字
判斷球體
算柱 (兩位數)
兩位數除以一位數（一）
找出對稱軸
Discover Resources
國旗製作
正方形轉轉
day01_04
Ext angle cyclic quad
四角柱體（長方體）的截面
Discover Topics
Vectors 2D (Two-Dimensional)
Ellipse
Subtraction
Stochastic Process or Random Process
Statistical Characteristics