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拿破崙三角形
Author:
羅驥韡 (Pegasus Roe)
說明影片：
http://youtu.be/q9nxM2MYOVE
GeoGebra
New Resources
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
找出對稱軸
柱體建築師
算柱 (兩位數)
Discover Resources
三角形外心-性質說明
circle1
雜項
Tangent perpendicular to radius
圓 點 直線 的複本
Discover Topics
Bar Chart or Bar Graph
Planes
Linear Equations
Circumcircle or Circumscribed Circle
Secant Line or Secant