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有理數加減法練習
Author:
fong ka ngai
GeoGebra
New Resources
折扣
双心四边形
科氏力 (Coriolis Force)
直線的斜率：水平變化 & 鉛垂變化
撒针估算面积实验
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題 3
立體錯覺樓梯(使用透視法會稍有差距)
vectore_four stack pile
repetitive squares by excel
旁心
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Percentages
Limits
Perimeter
Prism
Complex Numbers