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文字工具：設定旋轉文字位置
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
四邉形 (四年級) 教師版
算柱 (兩位數)
三位數除以一位數（二）
找出對稱軸
兩位數除以一位數（二）
Discover Resources
waaachen
拿破崙三角形
Pappus古定理證明
國旗會動
Question 3
Discover Topics
Quadratic Equations
Coordinates
Ellipse
Translation
Prism