document.write( "Question 1036057: The front of an A-frame cabin in a national park is in the shade of a triangle, with an area of 189 ft^2. If the height is 1 ft less than twice the base, find the base and the height of the front of the cabin?
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Algebra.Com's Answer #650652 by fractalier(6550)\"\" \"About 
You can put this solution on YOUR website!
The area of a triangle is of course
\n" ); document.write( "\"A+=+%281%2F2%29bh\"
\n" ); document.write( "Here A = 189 and h = 2b - 1...plugging in gives us
\n" ); document.write( "189 = (1/2)(b)(2b-1)
\n" ); document.write( "378 = 2b^2 - b
\n" ); document.write( "2b^2 - b - 378 = 0
\n" ); document.write( "and if you solve this you get
\n" ); document.write( "(2b + 27)(b - 14)=0 and
\n" ); document.write( "b = 14 or b = -13.5
\n" ); document.write( "The base has to be 14 ft and the height is 2(14)-1 = 27 ft.
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