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向量的加減
Author:
arist
GeoGebra
New Resources
画直线等分三角形的面积
球体的体积推导（优化版）
兩位數除以一位數（二）
判斷球體
畫出對稱圖形
Discover Resources
塗色
教學－旋轉
橢圓之極偶 / polarity for ellipse
到點與線段距離相等
Protractor-usage
Discover Topics
Line Segment
Circle
Vectors 3D (Three-Dimensional)
Isosceles Triangles
Diagrams