document.write( "Question 953663: base of tool shed is 18 by 18 feet. the height of the rectangular side is 9 feet. the builder is considering using an angle that measures 125 degrees. determine the surface area of the roof if the 125 degree angle is used. \n" ); document.write( "
Algebra.Com's Answer #582427 by josgarithmetic(39617)\"\" \"About 
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The top line of the roof separates the roof space into a cross section with a base 9 feet, an angle of \"125%2F2=62%261%2F2\" degrees opposite the 9 foot base, and this is a right triangle. The other angle along the top edge of the shed, the square part, is \"180-90-62%261%2F2=27.5\" degrees.\r
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\n" ); document.write( "\n" ); document.write( "You want to know the hypotenuse which is one of the dimensions of half of the roof.\r
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\n" ); document.write( "\n" ); document.write( "\"cos%2827.5%29=h%2F9\", h for hypotenuse;
\n" ); document.write( "\"h=9%2Acos%2827.5%29\"\r
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\n" ); document.write( "\n" ); document.write( "Now, ONE surface of the roof is \"9%2A9cos%2827.5%29\"; and there are two of these, so the entire roof surface area is \"highlight%282%2A9%2A9cos%2827.5%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "(I know, a picture would help.)
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