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正方形折纸减去两角
Author:
孟宝兴
GeoGebra
New Resources
兩位數加法
球體建築師
四邊形的特性
拼砌四邊形
画直线等分三角形的面积
Discover Resources
領結的角度
集合運算
雙搖桿
圓柱切割
指考試題
Discover Topics
Symmetry
Geometric Transformations
Vectors 3D (Three-Dimensional)
Secant Line or Secant
Random Experiments