Math Is Fun Forum

tony123

Member

Registered: 2007-08-03

Posts: 230

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 (2008-07-08 09:57:47)