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平行四邊形面積一
Author:
youzhen shih
Topic:
Area
GeoGebra
New Resources
双心四边形
第八周作业
平行線的判定
百分數及其應用
折扣
Discover Resources
Rotational Symmetry - Octahedron
軌跡為橢圓或雙曲線
中華民國國旗
利用对称求线段和最值（移动端）的副本
比較分數的大小(小六)
Discover Topics
Circumcircle or Circumscribed Circle
Planes
Mathematics
Square
Terms