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根據百分率找數量（一）: 例4的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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判斷球體
兩位數除以一位數（二）
兩位數加法
拼砌四邊形
柱體建築師
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不等式的應用
垂直線的斜率_hui sir
gltyz 斜圓錐
max_error
圆链的反演
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Translation
Orthocenter
Rhombus
Sine
Cuboid