document.write( "Question 117640: the measure of each of the congruent angles of an isosceles triangle is 9 degrees less than 4 times the vertex angle. find the measure of each angle of the triangle \n" ); document.write( "
Algebra.Com's Answer #85690 by scott8148(6628)\"\" \"About 
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let x=\"vertex angle\"\r
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\n" ); document.write( "\n" ); document.write( "\"the measure of each of the congruent angles of an isosceles triangle is 9 degrees less than 4 times the vertex angle\"
\n" ); document.write( "___ 4x-9\r
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\n" ); document.write( "\n" ); document.write( "2(4x-9)+x=180 ___ 8x-18+x=180 ___ 9x=172
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