document.write( "Question 1131518: please I want to show you a picture so you can solve my question its about find measure of triangle inside a pentagon , but its complex so you have to see the picture \n" ); document.write( "
Algebra.Com's Answer #748185 by MathLover1(20850)\"\" \"About 
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here you have regular (all angles the same) pentagon\r
\n" ); document.write( "\n" ); document.write( "The Interior Angles of a Pentagon add up to \"540\"°; so, each interior angle measures \"108\"°\r
\n" ); document.write( "\n" ); document.write( "since angle \"x\" is interior angle, we know that \"x=108\"°\r
\n" ); document.write( "\n" ); document.write( "angle \"y\" is in the triangle \"DBC\" and we know that \"DC=CB\"; so we have an \"isosceles\" triangle\r
\n" ); document.write( "\n" ); document.write( "=> angle \"y=z\" \r
\n" ); document.write( "\n" ); document.write( "since \"x%2By%2Bz=180\", substitute \"x\" and \"z\", then we have\r
\n" ); document.write( "\n" ); document.write( "\"108%2By%2By=180\" \r
\n" ); document.write( "\n" ); document.write( "\"2y=180-108\" \r
\n" ); document.write( "\n" ); document.write( "\"2y=72\" \r
\n" ); document.write( "\n" ); document.write( "\"y=36\"° \r
\n" ); document.write( "\n" ); document.write( "your answer is: \"x=108\"°, \"y=36\"° , \"z=36\"° \r
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