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平行四邊形有甚麼特性？
Author:
Anthony OR 柯志明
Topic:
Parallelogram
English version:
http://ggbtu.be/m79826
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數除以一位數（二）
四邉形 (四年級) 教師版
兩位數加法
兩位數除以一位數（一）
Discover Resources
拿破侖定理(外拿破侖)證明一
先估算，後看解釋
Simulation of the uniform variable linear motion with GeoGebra
黃金矩形
分數乘法列式練習
Discover Topics
Rhombus
Trigonometric Functions
Polynomial Functions
Integral Calculus
Optimization Problems