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angle sum of polygon
Author:
Felix Yip Wing Chung
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數(二)
四邉形 (四年級) 教師版
畫出對稱圖形
柱體建築師
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複合圖形(二)
中一︰全等圖形(平移、旋轉、反射)
二元线性规划的图解法(18.2 例6)
序列的应用案例--挤油的圆
繪畫正方形
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Prism
Median Line
Angles
Square
Cone