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达芬奇椭圆仪
Author:
蔡永志
Topic:
Conic Sections
达芬奇椭圆仪
GeoGebra
New Resources
兩位數加法
三位數除以一位數（二）
判斷球體
畫出對稱圖形
異分母分數減法
Discover Resources
第一本
正切函數的絕對值圖形
拋物面光學性質
Gazing Cow Problem (c)
直角坐标系
Discover Topics
Ellipse
Trigonometry
Prism
Congruence
Function Graph