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任意正N边形在圆内滚动顶点的轨迹
Author:
孟宝兴
GeoGebra
New Resources
判斷球體
兩位數加法
三位數除以一位數（二）
三位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
畢氏定理(五移動)
angles in the same segment
畢氏定理 (勾股定理) <Pythagorean theorem>
拋物線：切線與弦中點
除法Q2
Discover Topics
Random Variables
Differential Equation
Exponent
Fractions
Rhombus