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#1 2008-07-09 07:57:27

tony123
Full Member

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In acute triangle ABC

In acute triangle ABC with circumcenter O and altitude AP, angle C
is greater than or equal to angle B plus 30 degrees. Prove that angle A
plus angle COP is less than 90 degrees.

Last edited by tony123 (2008-07-09 07:57:47)

 

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