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凹透鏡鏡像
Author:
+x sir
GeoGebra
New Resources
拼砌四邊形
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
Discover Resources
縫衣針
Copy of 固定周界的長方形的面積變化
y=sinx的伸縮平移
梯形堆垛
科氏力 (Coriolis Force)
Discover Topics
Complex Numbers
Definite Integral
Congruence
Isosceles Triangles
Logarithm