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圆心可变的扇形在x轴上滚动
Author:
赵林
GeoGebra
New Resources
異分母分數減法
判斷球體
兩位數除以一位數（一）
四邉形 (四年級) 教師版
画直线等分三角形的面积
Discover Resources
GeoGeBra畫橢圓形的動態軌跡
抛物线
P3 3S1 製作平行四邊形 / Construct Parallelograms
公切線的引入
Copy of 多边形外角和
Discover Topics
Rectangle
Sequences and Series
Statistical Characteristics
Geometric Transformations
Secant Line or Secant