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平行四邊形
Author:
Ching-Hui Chou
Topic:
Parallelogram
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
判斷球體
拼砌四邊形
兩位數除以一位數（二）
【案例】2013年安徽高考15题
Discover Resources
rabbit
九點圓
正n凸多邊形旋轉對稱／反射對稱
三角形的心的副本
河內塔 3D (Tower of Hanoi 3D)
Discover Topics
Statistical Characteristics
LCM and GCD
Arithmetic
Triangles
Correlation