document.write( "Question 478114: how do you find the smallest angle of a triangle with sides 11cm, 13cm and 17cm? \n" ); document.write( "
Algebra.Com's Answer #327608 by robertb(5830)\"\" \"About 
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The smallest angle should be the one opposite the shortest side, namely the side with length 7.\r
\n" ); document.write( "\n" ); document.write( "From the cosine law,\r
\n" ); document.write( "\n" ); document.write( "\"11%5E2+=+13%5E2+%2B+17%5E2+-+2%2A13%2A17%2AcosA\"\r
\n" ); document.write( "\n" ); document.write( "==> -337 = -442*cos A\r
\n" ); document.write( "\n" ); document.write( "==> \"A+=+cos%5E%28-1%29%28337%2F442%29\"\r
\n" ); document.write( "\n" ); document.write( "==> A = 40.32 degrees, to 2 decimal places.
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