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摺長方形
Author:
湯士賢
GeoGebra
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【案例】2013年安徽高考15题
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數除以一位數（二）
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折線軌跡
Magic Matches
Angles in a Circle:Property 3
畢式定理 (13)的副本
A的影响
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Parametric Curves
Prism
Rhombus
Perimeter
Median Line