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特製的門 2
Author:
李春培
特製的門2
https://www.facebook.com/video.php?v=730160733696759&fref=nf
GeoGebra
New Resources
算柱 (兩位數)
第八周作业
三位數除以一位數（一）
兩組對邊相等的四邊形
畫出對稱圖形
Discover Resources
椭圆的定义
四面體 ABCD, AB 與 CD 距離
Ex5D#7
摺長方形2
Inclined plane (Angle between two planes)
Discover Topics
Special Points
Expected Value
Straight Lines
LCM and GCD
Linear Programming or Linear Optimization