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三角形的三线
Author:
Xiaoting Yuan
GeoGebra
New Resources
算柱 (兩位數)
四邊形的特性
画直线等分三角形的面积
柱體建築師
判斷球體
Discover Resources
正弦函數y=sin(x)的泰勒級數
軌跡五、六︰移動點與兩直線保持相等距離(平行線/角平分線)
面積認識
-3 ≤ cosA+cosB+cosC ≤ 3/2
橢圓軌跡