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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
兩位數除以一位數（一）
兩位數加法
找出對稱軸
第八周作业
兩組對邊相等和有直角的四邊形
Discover Resources
根據百分率找數量（二）: 例1
樞紐問題
正割函數的絕對值圖形
Distance(距離公式)
i love you的副本
Discover Topics
Intersection
Hypergeometric Distribution
Statistical Characteristics
Similar Triangles
Symmetry