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GeoGebra
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Author:
Lin Ching Chieh
GeoGebra
New Resources
算柱 (兩位數)
找出對稱軸
柱體建築師
拼砌四邊形
三位數除以一位數（二）
Discover Resources
GeoGebra繪本
圖E
圓柱截痕
橢圓包絡線
再作万年历单晨
Discover Topics
Straight Lines
Planes
Logic
Frequency Distribution
LCM and GCD