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y斜線
Author:
raya81901
GeoGebra
New Resources
拼砌四邊形
找出對稱軸
三位數除以一位數（一）
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
立體錯覺樓梯(使用透視法會稍有差距)
Is this a prism 6
Twist Bottle
∠APB ≥ 30°
sintx
Discover Topics
Matrices
Means
Integers
Cone
Line Segment