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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)