document.write( "Question 549418: a rectangle has sides with a length of 5cm and 12 cm. what is the length of the digaonal of the rectangle \n" ); document.write( "
Algebra.Com's Answer #357737 by oberobic(2304)\"\" \"About 
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A rectangle has 4 90-degree angles, so you can apply the Pythagorean Theorem to find the diagonal.
\n" ); document.write( "c^2 = a^2 + b^2
\n" ); document.write( "a = 5 cm
\n" ); document.write( "b = 12 cm
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\n" ); document.write( "c^2 = 25 + 144 = 169 cm^2
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\n" ); document.write( "c = sqrt (169) = + or - 13 cm
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\n" ); document.write( "A negative diagonal is spurious, so we can say:
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\n" ); document.write( "Diagonal = 13 cm.
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\n" ); document.write( "Done.
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