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圓與兩平行切線
Author:
luke huang
GeoGebra
New Resources
拼砌四邊形
四邊形的特性
柱體建築師
三位數除以一位數（一）
兩位數加法
Discover Resources
Direct Variation
Treće pravilo podudarnosti
骨牌
二次函數描點
禪繞畫
Discover Topics
Rational Numbers
Rotation
General Quadrilateral
Continuity
Tangent Line or Tangent