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   Author  Topic: a triangle  (Read 300 times)
tony123
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a triangle  
« on: Aug 6th, 2007, 6:27pm »		 Quote Quote Modify Modify
Prove the following: if, in a triangle ABC,  BA =CB  
O in atriangle  
< BAO = < OAC = 20°,  
< ACO = 10°,  
and < OCB = 30°,  
then< OBC = 80°.
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Barukh
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Re: a triangle  
« Reply #1 on: Aug 8th, 2007, 9:08am »		 Quote Quote Modify Modify
This is relevant.
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