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 Diameter and a middle
Сообщение10.10.2011, 01:21 
Аватара пользователя
From point P are drawn the tangents PA and PB to a circle k. AC is a diameter of k. A line through B perpendicular to CP intersects AC and the ray PA at the points D and E respectively. Prove that D is the middle of BE.

 
 
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