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根據百分率找數量（二）: 例1
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
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兩位數除以一位數（二）
兩組對邊相等的四邊形
球体的体积推导
判斷球體
三位數除以一位數（一）
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百分數（小學）：折扣 / 賺賠
正三角形在正方形圓直線上
畢氏定理拼圖
test
外心
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Geometry
Parametric Curves
Set Theory
Cuboid
Translation