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生日问题
Author:
Zhang Guangmin
Topic:
Probability
GeoGebra
New Resources
三位數除以一位數（一）
找出對稱軸
【案例】2018年全国1卷理科12题
四邊形的特性
畫出對稱圖形
Discover Resources
一个圆的若干竞赛异型题
圓外切四邊形
謝爾賓斯基-六角形
圆的面积原理
橢圓軌跡 (4)的副本
Discover Topics
Matrices
Trigonometric Functions
Numbers
Exponent
Orthocenter