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quadrilaterals 5
Author:
iedc
GeoGebra
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直角坐標平面上的旋轉變換
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數(一)
四邉形 (四年級) 教師版
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立體圖形
人生宇宙
拋物線相似
排水法求物件體積
除法2
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Real Numbers
Line Segment
Square
Probability
Integers