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正三角形在长方形边上移动加滚动
Author:
赵林
GeoGebra
New Resources
判斷球體
画直线等分三角形的面积
三位數除以一位數(一)
球體建築師
兩位數除以一位數(二)
Discover Resources
幾何作圖動畫示範
Conic Sections
locus
max_error
函数奇偶性的图像特征
Discover Topics
Straight Lines
Calculus
Ellipse
Histogram
Vectors