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題七
Author:
GeoGebra Institute of Hong Kong
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GeoGebra
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拼砌四邊形
美國國旗 (Codex 版)
長方體平面投影 (Codex版)
四邉形 (四年級) 教師版
小数 的副本
Discover Resources
四邊形的「等角分點」
平行四邊形
超快國旗
equations of circle 2
賺賠：例3的副本
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Ellipse
Mathematics
Derivative
Continuity
Curve Sketching