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兩面角
Author:
bulldog2960
GeoGebra
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拼砌四邊形
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
四邊形的特性
兩組對邊相等的四邊形
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龍騰4_1-1講段9
部分佔全部的百分率: 例1
國徽
黃金三角形
Orthocentre
Discover Topics
Normal Distribution
Set Theory
Real Numbers
Tangent Line or Tangent
Statistics