document.write( "Question 66425: two vertices of an octagon lie at (2, -2) and (11,10).
\n" ); document.write( "find the perimeter of the octagon.
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Algebra.Com's Answer #47117 by uma(370)\"\" \"About 
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Let us consider the two vertices to be the consecutive ones.\r
\n" ); document.write( "\n" ); document.write( "(2, -2), (11, - 10)\r
\n" ); document.write( "\n" ); document.write( "Distance between these points = sqrt[(11-2)^2 + (-10 -2)^2]\r
\n" ); document.write( "\n" ); document.write( " = sqrt[9^2 + 12^2]
\n" ); document.write( " = sqrt[81 + 144]
\n" ); document.write( " = sqrt[225]
\n" ); document.write( " = 15\r
\n" ); document.write( "\n" ); document.write( "==> the length of 1 side of the octagon measures 15 units.\r
\n" ); document.write( "\n" ); document.write( "Thus the perimeter = 15 * 8
\n" ); document.write( " = 120 units\r
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\n" ); document.write( "\n" ); document.write( "Good Luck!!!
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