document.write( "Question 209371: Find the length of the diagonal of a rectangular billboard whose sides are 5 feet and 12 feet. Note that the length of the diagonal of a rectangle with length = a and width = b is given by the Pythagorean Theorem c2 = a2 + b2.\r
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Algebra.Com's Answer #158288 by rfer(16322)\"\" \"About 
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c^2=a^2+b^2
\n" ); document.write( "c^2=5^2+12^2
\n" ); document.write( "c^2=25+144
\n" ); document.write( "c^2=169
\n" ); document.write( "sq rt of c=13ft
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