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正n邊形內接縮小正n邊形
Author:
許清惟
GeoGebra
New Resources
算柱 (兩位數)
三位數除以一位數（一）
四邉形 (四年級) 教師版
GeoGebra笔记功能体验课件
找出對稱軸
Discover Resources
waaachen
認識時鐘
面外一點
边长可变的正三角形上莱洛转子的滚动
函数求导
Discover Topics
Confidence Interval
Random Experiments
Sphere
Root
Rectangle