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正N边形在圆内的滚动
Author:
孟宝兴
GeoGebra
New Resources
第八周作业
拼砌四邊形
sanjiaohanshu
四邊形的特性
近似值：有效數字
Discover Resources
旋轉體：Washer Method
小數
Rotation（旋轉）
三角形的心
圆锥的侧面展开图3D动画的副本
Discover Topics
Arithmetic
Percentages
Integral Calculus
Congruence
Fractions