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类比探究（二）模块二中点结构-例1
Author:
万超杰
GeoGebra
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兩組對邊相等的四邊形
找出對稱軸
畫出對稱圖形
異分母分數減法
【案例】2018年全国1卷理科12题
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教學－旋轉
test05繪本用
量角器1
橢圓軌跡01
畫三角形 第3題
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General Quadrilateral
Inequalities
Tangent Line or Tangent
Intersection
Indefinite Integral