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平行四邊形_中
Author:
keihin
GeoGebra
New Resources
正方形雪花图案
双心四边形
第八周作业2
折扣
斐波那契螺旋弧线（表格法）
Discover Resources
正方體的旋轉對稱
directed number_hot air balloon
example1 star
Angles between line and planes in a cuboid
Congruent Triangle (SSS)
Discover Topics
Hyperbola
Perimeter
Cube
Percentages
Square