document.write( "Question 1153139: The vertices of triangle ABC are A(1,5), B(7,-1) and C(-2,-2). What is the perimeter of this triangle? \n" ); document.write( "
Algebra.Com's Answer #775290 by math_helper(2461)\"\" \"About 
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The perimeter is the sum of the lengths of each side:
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\n" ); document.write( "\n" ); document.write( "AB = \"+sqrt%28%287-1%29%5E2%2B%28-1-5%29%5E2%29+=+sqrt%2836%2B36%29+=+6sqrt%282%29+\" ... or approx 8.485
\n" ); document.write( "BC = \"+sqrt%28%28-2-7%29%5E2%2B%28-2-%28-1%29%29%5E2%29+=+sqrt%2881%2B1%29+=+sqrt%2882%29+\" ... approx 9.055
\n" ); document.write( "CA = \"+sqrt%28%281-%28-2%29%29%5E2%2B%285-%28-2%29%29%5E2%29+=+sqrt%289%2B49%29+=+sqrt%2858%29+\" ... approx 7.616
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\n" ); document.write( "Adding the three lengths (and assuming my math is correct):

\n" ); document.write( " perimeter = 25.156 units
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