document.write( "Question 1137072: When a drawbridge is open, the bridge forms a right angle with the doorway it leads to. A straight chain connects the far end of the bridge to the top of the doorway. If the doorway is 2 meters high and the chain is 2.5 meters long, find the length of the bridge, rounded to the nearest tenth. \n" ); document.write( "
Algebra.Com's Answer #755029 by ankor@dixie-net.com(22740)\"\" \"About 
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When a drawbridge is open, the bridge forms a right angle with the doorway it leads to.
\n" ); document.write( " A straight chain connects the far end of the bridge to the top of the doorway.
\n" ); document.write( " If the doorway is 2 meters high and the chain is 2.5 meters long, find the length of the bridge, rounded to the nearest tenth.
\n" ); document.write( ":
\n" ); document.write( "use the Pythagorean Theorem a^2 + b^2 = c^2, where
\n" ); document.write( "a = 2m the height of the door
\n" ); document.write( "b = the length of the bridge
\n" ); document.write( "c = 2.5m the length of the chain (hypotenuse)
\n" ); document.write( ":
\n" ); document.write( "2^2 + b^2 = 2.5^2
\n" ); document.write( "4 + b^2 = 6.25
\n" ); document.write( "b^2 = 6.25 - 4
\n" ); document.write( "b^2 = 2.25
\n" ); document.write( "b = \"sqrt%282.25%29\"
\n" ); document.write( "b = 1.5 meters is the length of the bridge \n" ); document.write( "
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