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多边形对角线
Author:
张英华
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
畫出對稱圖形
三位數除以一位數（二）
第八周作业
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呼拉圈
Lab 3 Task 8: Regular Pentagon Construction
Net of a cone
九點圓
雙曲線軌跡
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Function Graph
Translation
Median Value
Numbers
Rotation