Find angle OAC

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Fahim Shahriar
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Joined:Sun Dec 18, 2011 12:53 pm
Find angle OAC

Unread post by Fahim Shahriar » Sun Feb 24, 2013 2:26 pm

O is a point inside $\triangle ABC$ such that $\angle OBA = \angle OBC = 20°$ , $\angle OCB = 10°$ and $\angle OCA = 30°$.
$\angle OAC = ?$
Name: Fahim Shahriar Shakkhor
Notre Dame College

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