document.write( "Question 303677: one angle of a triangle measures 12 degrees. the second angle's measurement is five times the third. what is the measure of the third angle? \n" ); document.write( "
Algebra.Com's Answer #217613 by graphmatics(170)\"\" \"About 
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Express the first, second, and third angles of the triangle be expressed as x, y, and Z. From the first sentence x=12. From the second sentence y=5z. For triangles the sum of the angles of a triangle is 180. So we get three linear equations\r
\n" ); document.write( "\n" ); document.write( "x = 12
\n" ); document.write( "y = 5z
\n" ); document.write( "x+y+z = 180\r
\n" ); document.write( "\n" ); document.write( "Put the expressions for x and y fron the first and second equations into the third equation to get\r
\n" ); document.write( "\n" ); document.write( "12+5z+z = 180
\n" ); document.write( "6z = 180-12
\n" ); document.write( "6z = 168\r
\n" ); document.write( "\n" ); document.write( "So the third angle measurement, z, is\r
\n" ); document.write( "\n" ); document.write( "z=28.
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