document.write( "Question 134793: A 45-foot ladder is leaning against the top of building. The bottom of the ladder is 27 feet away from the building. How tall is the building? \n" ); document.write( "
Algebra.Com's Answer #98689 by vleith(2983)\"\" \"About 
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use Pythagorean theorem
\n" ); document.write( "\"a%5E2+%2B+b%5E2+=+c%5E2\"
\n" ); document.write( "in this case, you are given the hypotenuse and one leg.
\n" ); document.write( "So, c = 45 and a = 27.\r
\n" ); document.write( "\n" ); document.write( "Plug in and solve for b and that is your answer
\n" ); document.write( "\"b%5E2+=+c%5E2+-+a%5E2\"
\n" ); document.write( "\"b%5E2+=+45%5E2+-+27%5E2\"
\n" ); document.write( "\"b+=+sqrt%2845%5E2-27%5E2%29\"
\n" ); document.write( "b = 36\r
\n" ); document.write( "\n" ); document.write( "notice the ratio of the sides --> 3:4:5 that is a common ratio in these types of problems. Keep an eye out for them :)
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