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兩圓的公切線
Author:
鍾元杰
兩圓的公切線
GeoGebra
New Resources
畫出對稱圖形
拼砌四邊形
兩組對邊相等的四邊形
Fibonacci Clock
直角坐標平面上的旋轉變換
Discover Resources
畢氏定理動態證明
S4 Circle Theorems
Prism
二維
相反数 思考（教材第10页）
Discover Topics
Ellipse
Pie Chart or Circle Chart
General Quadrilateral
Geometry
Statistical Characteristics