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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
兩位數除以一位數（一）
柱體建築師
直角坐標平面上的旋轉變換
畫出對稱圖形
四邉形 (四年級) 教師版
Discover Resources
tccs work
小二、小三_時間（學生版）
柱體建築師 4
S4 Circle Theorems
Copy of 三角形的面積
Discover Topics
Arithmetic Operations
Piecewise Functions
Incircle or Inscribed Circle
Differential Equation
Derivative