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正八面體
Author:
黃國斌
GeoGebra
New Resources
拼砌四邊形
畫出對稱圖形
三位數除以一位數（一）
兩組對邊相等的四邊形
算柱 (兩位數)
Discover Resources
例題6
Probability animation
HHHH
∠APB ≥ 30°
探究平行四邊形面積
Discover Topics
Symmetry
Set Theory
Subtraction
Logarithmic Functions
Geometric Mean