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保持比例
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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判斷球體
兩組對邊相等的四邊形
三位數除以一位數（二）
四邊形的特性
三位數除以一位數（一）
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部分佔全部的百分率 :例2
共點線1
地球儀5
習題0330-2017
翹翹板
Discover Topics
Congruence
Cube
Natural Numbers
Diagrams
Quadratic Equations