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平移旋轉對稱
Author:
chen mingchuan
GeoGebra
New Resources
三角函数 的副本
直線的斜率
折扣
常见四边形是否是双心四边形
斜率的值
Discover Resources
Area of Triangle_1
橢圓
外心垂心問題
余弦定理的证明
平方差公式的几何意义
Discover Topics
Continuity
Equilateral Triangles
Subtraction
Random Variables
Arithmetic Operations