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凸透鏡成像_由像到物_橢圓到圓
Author:
澳坊物理
Topic:
Circle
,
Conic Sections
,
Constructions
GeoGebra
New Resources
兩位數除以一位數（二）
球体的体积推导（优化版）
兩組對邊相等的四邊形
畫出對稱圖形
異分母分數減法
Discover Resources
兩圓關係與公切線
平行線 (同位角 - 1對)
Conic section
三節棍1060317
二倍角的正切公式的证明
Discover Topics
Statistical Characteristics
Continuity
Geometric Mean
Median Line
Numbers