document.write( "Question 1028875: Find the largest angle of the Triangle whose sides are 7cm,5cm,3cm \n" ); document.write( "

Algebra.Com's Answer #643948 by ikleyn(52909) $\"\"$ $\"About$

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\n" ); document.write( "Find the largest angle of the Triangle whose sides are 7cm,5cm,3cm
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document.write( "The largest angle    is opposite to the longest side, which is 7 cm.\r\n" );
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document.write( "So from the Cosines Law theorem  (see, for example, the lesson  Proof of the Law of Cosines revisited  in this site),  you have \r\n" );
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document.write( " = ,   or\r\n" );
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document.write( " = ,   or\r\n" );
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document.write( " = ,   or\r\n" );
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document.write( " = ,   or\r\n" );
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document.write( " =  = .\r\n" );
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document.write( "Hence,   = 120 degrees.\r\n" );
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document.write( "Answer.   = 120 degrees.\r\n" );
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