document.write( "Question 730806: Heron's formula for the area of a triangle with sides a, b, c is \n" );
document.write( "A = the square root of(s(s − a)(s − b)(s − c)) \n" );
document.write( ", \n" );
document.write( "where \n" );
document.write( "s = 1/2(a+b+c)\r \n" );
document.write( " \n" );
document.write( "\n" );
document.write( "Use Heron's formula to find the area of a triangle with vertices located at \n" );
document.write( "(2, 3), (−7, −9), and (−4, 11) \n" );
document.write( "in a rectangular coordinate system. \n" );
document.write( "
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