document.write( "Question 1033914: Find the area of the triangle whose sides lie on the graphs of 3x + y + 1 = 0, x + 4y -7 = 0, and -5x + 2y + 13 = 0 \n" ); document.write( "
Algebra.Com's Answer #648585 by ikleyn(52814)\"\" \"About 
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\n" ); document.write( "Find the area of the triangle whose sides lie on the graphs of
\n" ); document.write( "3x + y + 1 = 0,
\n" ); document.write( "x + 4y -7 = 0, and
\n" ); document.write( "-5x + 2y + 13 = 0
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\n" ); document.write( "\n" ); document.write( "Plot 3x + y + 1 = 0, x + 4y -7 = 0, and -5x + 2y + 13 = 0
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\n" ); document.write( "\n" ); document.write( "Solve the system, find the coordinate of vertices, find the side dimensions and apply the Heron's formula.\r
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