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Triangle
Author:
iedc
GeoGebra
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四邉形 (四年級) 教師版
三位數除以一位數(二)
錐體建築師
直角坐標平面上的旋轉變換
畫出對稱圖形
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Angles associated with Parallel Lines 平行線上的角
ie 2
sin函數
圓面積示範
正方形纸片剪出正三角形(顶点在边上)
Discover Topics
Constructions
Confidence Interval
Probability
Interest Calculation
Fractions