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30度直角三角形
Author:
郭勇
GeoGebra
New Resources
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
第八周作业
球體建築師
錐體建築師
Discover Resources
q5-11
Ex5C#15
圓錐截痕模型
圓心角圓周角弦切角
答重庆杨志友椭圆的定义
Quiz on Solving One-step Linear Equations (1)
Discover Topics
Similarity Transformation or Similarity
Conic Sections
Rectangle
Cube
Triangles