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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
兩位數加法
兩組對邊相等的四邊形
拼砌四邊形
兩組對邊相等和有直角的四邊形
柱體建築師
Discover Resources
test for fun
一題多解,托勒密,代數,三角,柯西,鍾元杰
函數圖形
畫鐘面的副本
画直线等分三角形的面积
Discover Topics
Polygons
Unit Circle
Differential Equation
Triangles
Planes