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约瑟夫问题
Author:
孟宝兴
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
拼砌四邊形
【案例】2018年全国1卷理科12题
第八周作业
Discover Resources
trapezium
正方形內部
题1
橢圓的副本
数矩形个数
Discover Topics
Area
Right Triangles
Orthocenter
Translation
Intersection