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周界(1)
Author:
Kenneth Wong
GeoGebra
New Resources
常见四边形是否是双心四边形
平行線的判定
百分數及其應用
第三周作业效果演示
第八周作业
Discover Resources
帕普斯定理：齊次座標
Angles in intersecting and parallel lines
鸚鵡螺旋線
网易
滚动系列
Discover Topics
Optimization Problems
Function Graph
Orthocenter
Rectangle
Hyperbola