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根據百分率找數量（二）: 例3
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
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直角坐標平面上的旋轉變換
畫出對稱圖形
四邊形的特性
兩組對邊相等和有直角的四邊形
錐體建築師
Discover Resources
幾何變換
HW3.NationalFlag
P4周界
圓與切線
椭圆的定义
Discover Topics
Logic
Histogram
Volume
Matrices
Addition