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正N边形在圆内的滚动
Author:
孟宝兴
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
球體建築師
第八周作业
兩位數加法
【案例】圆柱体内放置一个大球六个小球
Discover Resources
空間中平面
優良作品6(沛綺)
旋轉動畫
proof*5 張華炘
grass eating
Discover Topics
Trapezoid
Centroid or Barycenter
Indefinite Integral
Congruence
Sphere