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20150328_3FillingColorOnSquareDividedTo9Parts
Author:
Shun-Sheng Su
GeoGebra
New Resources
畫出對稱圖形
兩位數加法
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
錐體建築師
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二項分布標準化
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
正四面體對邊向量垂直作圖證明
Version 2
翰林數學_2下_CH3-1_三角形的外角和
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Probability
Parabola
Perimeter
Percentages
Geometric Distribution