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兩邊和大於第三邊
Author:
鄭義霖
GeoGebra
New Resources
判斷球體
錐體建築師
画直线等分三角形的面积
四邉形 (四年級) 教師版
三位數除以一位數（二）
Discover Resources
證平行四邊形 (對邊相等)
軌跡教學
廣義三角函數
congruent triangle2_provided by Mr Yeung Kar Chun
y=-3x+6(x>=3)
Discover Topics
Cone
Hyperbola
Square
Congruence
Constructions