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外公切線段長求法
Author:
謝易達
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
球體建築師
兩位數除以一位數（一）
錐體建築師
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向量相加
抛物线
勝者即正義
椭圆内光线的反射
工作紙(1) 思考題
Discover Topics
Vectors 2D (Two-Dimensional)
Cosine
Square
Tangent Line or Tangent
Rhombus