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圓心在同一直線上且相切的圓(半徑可改變)
Author:
lee chao ming
GeoGebra
New Resources
異分母分數減法
三位數除以一位數（二）
算柱 (兩位數)
第八周作业
四邊形的特性
Discover Resources
step
直角坐標平面
平行四邊形
數學繪圖
圓與切線
Discover Topics
Tangent Line or Tangent
Percentages
Similarity Transformation or Similarity
Fractal Geometry
Area