document.write( "Question 974717: A large fireplace in a hotel has a rectangular opening with a height of 5 feet and a diagonal of 13 feet, as shown in the diagram below. \n" ); document.write( "
Algebra.Com's Answer #596568 by Danielshinmath(31)\"\" \"About 
You can put this solution on YOUR website!
If you are asking what the length is, sure the pythagorean theorem.
\n" ); document.write( "it will be 13^2 - 5^2 =12^2
\n" ); document.write( "So the answer will be 12 feet
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