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釘點紙畫三角形
Author:
Anthony OR 柯志明
GeoGebra
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畫出對稱圖形
四邊形的特性
【案例】2018年全国1卷理科12题
兩位數加法
拼砌四邊形
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過圓內c點的弦中點軌跡
平行四邊形柱展開
三角形內角和_1
正四角錐(旋轉，實體、透視)
整數除真分數
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Area
Continuity
Circle
Triangles
Similar Triangles