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同心圓
Author:
施奕瑄
GeoGebra
New Resources
兩組對邊相等的四邊形
画直线等分三角形的面积
球体的体积推导（优化版）
畫出對稱圖形
GeoGebra笔记功能体验课件
Discover Resources
waaachen
兩圓內外公切線
畢氏定理動態證明(四塊直角三角形移動)
repetitive squares by excel
How to draw a triangle with ruler and compasses?
Discover Topics
Similarity Transformation or Similarity
Hypergeometric Distribution
Tangent Line or Tangent
Histogram
Geometric Transformations