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三比值和為一
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
画直线等分三角形的面积
拼砌四邊形
異分母分數減法
三位數除以一位數（二）
兩位數加法
Discover Resources
Symmetric 設計對稱圖案(一條對稱軸)(垂直)
大邊對大角
三角形的內角和+內心與外心
DSE Circle-ACT06 Relationship of Tangents and Radius of a Circle
Lesson02 absolute value function
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Root
Planes
Functions
Reflection
Square