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王二星际
Author:
王连福
GeoGebra
New Resources
找出對稱軸
兩位數除以一位數（一）
球体的体积推导
兩位數除以一位數（二）
拼砌四邊形
Discover Resources
三角形的外心
橢圓
thm 11,12
绝对值加减的图像
五点共圆
Discover Topics
Orthocenter
Linear Regression
Perimeter
Similarity Transformation or Similarity
Geometric Transformations