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對頂角_2
Author:
maths324324
GeoGebra
New Resources
錐體建築師
兩組對邊相等和有直角的四邊形
兩位數加法
【案例】2013年安徽高考15题
三位數除以一位數（一）
Discover Resources
九點圓 (9-Point Circle)
方格紙上畫平行四邊形4
Linear Inequalities in Two Unknowns 二元一次不等式
Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
找中點軌跡
Discover Topics
Triangles
Ellipse
Ratios
Congruence
Normal Distribution