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Big Lee
GeoGebra
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四邊形的特性
sanjiaohanshu
兩組對邊相等的四邊形
兩位數加法
四邉形 (四年級) 教師版
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七巧板奔人2
已知A(1,2)與B(3,4)為兩定點,P(x,y)為直線x+2y=3上一點,求當直線PA=直線PB時 , P的坐標?
鏡射再旋轉
進入拋面的平行光會反射至焦點
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Plane Figures or Shapes
Prism
Inequalities
Geometric Distribution
Isosceles Triangles