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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
三位數除以一位數（一）
兩位數加法
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利用Locus指令將封閉區域塗色
test1(尋找北極星)
正八面體
圓錐
圓周和直徑(一)NEW
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Real Numbers
Parallelogram
Similar Triangles
Continuity
Polygons