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垂直平分线的性质
Author:
海平 文
Topic:
Triangles
GeoGebra
New Resources
异形操场
常见四边形是否是双心四边形
盈利與虧蝕
第八周作业2
斐波那契螺旋弧线（表格法）
Discover Resources
軌跡,摺紙,滾動,實驗觀察,曲線
Positive angles & Negative angles
柯西不等式 (2)
Ex5C#15
勾股定理的直观证明（义务教育数学 新课标-例82）
Discover Topics
Solids or 3D Shapes
Rectangle
Sequences and Series
Surface
Right Triangles