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peacock
Author:
李春培
peacock
GeoGebra
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兩組對邊相等和有直角的四邊形
拼砌四邊形
sanjiaohanshu
找出對稱軸
兩位數除以一位數（一）
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截面法體積(2)
直線與圓的位置關係
三角形
congruent (SA)
人教版必修I函数表示P21例5
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Matrices
Median Value
Rectangle
Vectors 2D (Two-Dimensional)
Polygons