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Copy of Triangular Number
Author:
Ronan Downes
,
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
三位數除以一位數（二）
錐體建築師
四邊形的特性
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
Discover Resources
面積和體積
中點軌跡(動點在兩圓上)
PMC 2016-17
切割正二十面體
两次折叠
Discover Topics
Median Line
Fractal Geometry
Median Value
Expected Value
LCM and GCD