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ghseh 二次函數上下y值差
Author:
均一
GeoGebra
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兩組對邊相等和有直角的四邊形
找出對稱軸
三位數除以一位數（二）
錐體建築師
画直线等分三角形的面积
Discover Resources
彩虹理髮
Redefining Trigonometry by a Unit Circle
面積分點公式
周界
科赫雪花
Discover Topics
Vectors 3D (Three-Dimensional)
Coordinates
Expected Value
Complex Numbers
LCM and GCD