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根據百分率找數量（二）: 例3
Author:
GeoGebra Institute of Hong Kong
Topic:
Percentages
GeoGebra
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
找出對稱軸
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線段與角度的裝飾
网板第60期第2题
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Sequences and Series
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