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練習－由一元二次方程判別根的數目
Author:
Lau Sir
GeoGebra
New Resources
算柱 (兩位數)
畫出對稱圖形
三位數除以一位數（一）
GeoGebra笔记功能体验课件
四邊形的特性
Discover Resources
教學－面與面的夾角
直線與圓(直線方程式圖形特性2)
congruent triangles
Sphere[O, r]
S6G7三视图
Discover Topics
Hypothesis Testing
Arithmetic
Geometric Mean
Trapezoid
Translation