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陳兪宏
梯形求面積form ptt家教版
GeoGebra
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拼砌四邊形
柱體建築師
四邉形 (四年級) 教師版
GeoGebra笔记功能体验课件
錐體建築師
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河內塔 (Tower of Hanoi)
教學－面與面的夾角
S6 3D Basic Concept
Reuleaux triangle 掃地機器人v1.0
中国纸质灯笼
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Ellipse
Similar Triangles
Symmetry
Logarithm
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