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Christmas Tree
Author:
陳隆期
GeoGebra
New Resources
拼砌四邊形
球體建築師
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
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幾何變換
纏繞
More about Function
比較角的大小二
椭圆与圆的关系的副本
Discover Topics
Integers
Cone
Constructions
Statistics
Interest Calculation