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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
兩位數加法
算柱 (兩位數)
兩位數除以一位數（一）
GeoGebra笔记功能体验课件
找出對稱軸
Discover Resources
惡靈古堡保護傘
三角函數
Incentre
歐拉圓
Copy of cos, sin 與單位圓
Discover Topics
Indefinite Integral
Parallelogram
Translation
Normal Distribution
Differential Calculus