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平行1
Author:
Hui Sir
GeoGebra
New Resources
判斷球體
兩位數加法
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
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三角形，點上平分面積
log functions
Incentre
函数奇偶性的图像特征
P.5 面積問題04
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Distributions
Natural Numbers
Random Experiments
General Quadrilateral
Cone