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Angle (Extended 2)
Author:
Chan Kwan Ho
GeoGebra
New Resources
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
判斷球體
拼砌四邊形
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亂數取值 by java
Time
三角形面積公式 1/2 bc sinA
冪函數
四年級
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Ellipse
Statistics
Surface
Parametric Curves
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