Posted by **Jacob** on Monday, April 8, 2013 at 10:29pm.

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?

- Geometry -
**stop**, Sunday, April 14, 2013 at 6:53pm
cheating

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