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22-08-2015
Mathematics

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Two angles in a triangle add up to 115 degrees what is the size of the third angle?

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22-08-2015

[tex]The\ sum\ of\ an\ angles\ of\ a\ triangle\ equal\ 180^o.\\\\\alpha+\beta+\delta=180^o\\\\\alpha+\beta=115^o\\\\therefore\\\\115^o+\delta=180^o\ \ \ \ |subtract\ 115^o\ from\ both\ sides\\\\\delta=65^o\\\\Answer:\huge\boxed{65^o}[/tex]

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