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几何模版：线段关系练习
Author:
艳er
GeoGebra
New Resources
第八周作业
第八周作业2
圓的基本性質
撒针估算面积实验
三角函数 的副本
Discover Resources
曲柄滑塊模擬
垂直1
正方体展开图的副本
Copy of 劉徽的「割圓術」
运动变化的二次函数图象.许兴华数学
Discover Topics
Trigonometric Functions
Geometry
Incircle or Inscribed Circle
Similar Triangles
Linear Equations