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S4E09 转动的圆
Author:
宋晓燕
GeoGebra
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第八周作业1
异形操场
球体的截面
双心四边形
撒针估算面积实验
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简易立体几何
proof51 柯承志
三角形外心的位置
空間貝氏曲線
賺賠:例1的副本
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Trapezoid
Vectors 3D (Three-Dimensional)
Prism
Multiplication
Statistical Characteristics