document.write( "Question 105007: Four interior angles of a certain irregular pentagon are 38*, 96*, 112*, and 133*. Find the fifth interior angle. \n" ); document.write( "
Algebra.Com's Answer #76437 by doukungfoo(195)\"\" \"About 
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The sum of the interior angles of any pentagon will always equal 540
\n" ); document.write( "So if we call the fifth interior angle x
\n" ); document.write( "then we can write an equation with the given information to solve for x
\n" ); document.write( "38 + 96 + 112 + 133 + x = 540
\n" ); document.write( "379 + x = 540
\n" ); document.write( "x = 540 - 379
\n" ); document.write( "x = 161
\n" ); document.write( "Answer: the fifth interior angle is 161 degrees
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