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Heron formula
Author:
ralphchen
GeoGebra
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圓周公式的應用
画直线等分三角形的面积
球体的体积推导
漂亮的摇摆曲线
三位數除以一位數(一)
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滾動
葉子型
立方體截痕
以多維度解釋標準差
長方形的周界與長和闊的關係 (學生版)
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Inequalities
Solids or 3D Shapes
Ellipse
Piecewise Functions
Triangles