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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
算柱 (兩位數)
拼砌四邊形
兩位數除以一位數（二）
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
Discover Resources
GGB-BOOK
reflection of tetrahedron
多項式函數
folding paper by Mr LO WY
轴对称的两点的动画演示.许兴华数学
Discover Topics
Conditional Probability
Interest Calculation
Logarithmic Functions
Power Functions
Parametric Curves