Outer Similar axis : The line joining three outer similar points X, Y, Z of three circles is called outer similar axis (or monge line).

 
  • 外相似軸:給定三圓,則三對外相似點(diǎn)X,Y,Z在同一直線(xiàn)上(蒙日直線(xiàn))。此性質(zhì)又稱(chēng)為"蒙日定理"。
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