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GeoGebra
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GeoGebra
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example 1_sun
Author:
ypy
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
拼砌四邊形
兩位數加法
兩位數除以一位數（二）
Discover Resources
固定周界的長方形的面積變化
蝴蝶定理推廣證明1
天干與地支
ie 8
动点最值问题&抛物线模型
Discover Topics
Percentages
Exponent
Natural Numbers
Histogram
Median Value