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Properties of a Rectangle
Author:
Lttcmooc
GeoGebra
New Resources
拼砌四邊形
兩組對邊相等的四邊形
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
Discover Resources
幾何作圖動畫示範
glt-c02-09 五角柱旋轉
F-10-2-poly3-gph-bac-1
二次方程动态函数曲线
正N边形在圆内的滚动
Discover Topics
Special Points
Variance
Cosine
Means
Equilateral Triangles