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平行四邊形有甚麼特性？
Author:
Anthony OR 柯志明
Topic:
Parallelogram
GeoGebra
New Resources
四邊形的特性
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
異分母分數減法
【案例】2013年安徽高考15题
Discover Resources
clock
三棱锥的体积推导
斯霍滕(Schooten)定理(與角平分線定理等價)
餘數處理
Copy of 十字交乘法
Discover Topics
Isosceles Triangles
Triangles
Statistics
Difference and Slope
Rational Numbers