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包絡線：橢圓
Author:
羅驥韡 (Pegasus Roe)
Topic:
Ellipse
GeoGebra
New Resources
球體建築師
三位數除以一位數（一）
畫出對稱圖形
兩位數加法
異分母分數減法
Discover Resources
分數除法4: 1 ÷ a/b (包含)
正立方體與正三角錐
點座標旋轉公式
面積題 F
题1
Discover Topics
Dilation
Fractions
Line Segment
Median Value
Trigonometry