document.write( "Question 989336: The two guy wires supporting a tower form an isosceles triangle with the ground. Each of the base angles of the triangle is 7 times the third angle (the vertex angle). Find the measure of the vertex angle. \n" ); document.write( "
Algebra.Com's Answer #609687 by ankor@dixie-net.com(22740)\"\" \"About 
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The two guy wires supporting a tower form an isosceles triangle with the ground.
\n" ); document.write( " Each of the base angles of the triangle is 7 times the third angle (the vertex angle).
\n" ); document.write( " Find the measure of the vertex angle.
\n" ); document.write( ":
\n" ); document.write( "let A = the vertex angle
\n" ); document.write( "then
\n" ); document.write( "7A = the base angles
\n" ); document.write( ":
\n" ); document.write( "7A + 7A + A = 180
\n" ); document.write( "15A = 180
\n" ); document.write( "A = 180/15
\n" ); document.write( "A = 12 degrees is the vertex angle
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