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旋轉縮小的正方形
Author:
rachmaninoff
GeoGebra
New Resources
兩位數加法
三位數除以一位數（二）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
判斷球體
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內心與角平分線觀察
數的組合(探究)
二重積分 (Double Integral)的副本
尺规作图
三角形
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Area
Combinatorics
Subtraction
Statistics
LCM and GCD