document.write( "Question 993872: A farmer has a triangular shaped field, FLD. DF-350m, FL= 240m and DL=400m. Calculate the angle to the nearest degree. \n" ); document.write( "
Algebra.Com's Answer #613070 by ikleyn(52796)\"\" \"About 
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\n" ); document.write( "A farmer has a triangular shaped field, FLD. DF-350m, FL= 240m and DL=400m. Calculate the angle to the nearest degree.
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\n" ); document.write( "There are  3  angles.  Angle  F  is opposite the longest side.
\n" ); document.write( "Use the Cosine Law:
\n" ); document.write( "400^2 = 350^2 + 240^2 - 2*350*240*cos(F).\r
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\n" ); document.write( "\n" ); document.write( "I got  m(LF) =~ 83° (approximately).\r
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\n" ); document.write( "\n" ); document.write( "For the Cosine Law see,  for example,  the lesson  Proof of the Law of Cosines revisited  in this site.\r
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