document.write( "Question 1037280: a triangle has three angles 110, 50 and 20. the longest side is 5 cm longer than the smallest side. Determine the perimeter of the triangle \n" ); document.write( "
Algebra.Com's Answer #651966 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! a triangle has three angles 110, 50 and 20. the longest side is 5 cm longer than the smallest side. Determine the perimeter of the triangle \n" ); document.write( "------------ \n" ); document.write( "The smallest side is opposite the smallest angle. \n" ); document.write( "x = length of smallest side \n" ); document.write( "--- \n" ); document.write( "x/sin(20) = (x+5)/sin(110) \n" ); document.write( "x*sin(110) = (x+5)*sin(20) = x*sin(20) + 5sin(20) \n" ); document.write( "x*(sin(110) - sin(20)) = 5sin(20) \n" ); document.write( "x = 5sin(20)/(sin(110) - sin(20)) \n" ); document.write( "x =~ 2.861267 \n" ); document.write( "Longest side = 7.861267 \n" ); document.write( "---- \n" ); document.write( "Find the 3rd side. Call it s: \n" ); document.write( "x/sin(20) = s/sin(50) \n" ); document.write( "s = x*sin(50)/sin(20) \n" ); document.write( "s =~ 6.40856 \n" ); document.write( "================ \n" ); document.write( "Add those to find the perimeter. \n" ); document.write( " |