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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
三位數除以一位數（一）
GeoGebra笔记功能体验课件
四邉形 (四年級) 教師版
兩位數除以一位數（二）
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Introduction to Polar Coordinates 極坐標簡介
P2 Animated Clock
長方形面積法 _單項式乘法
海螺
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Discover Topics
Piecewise Functions
Means
Hypothesis Testing
Functions
Expected Value