document.write( "Question 638452: the vertex angle of an isosceles triangle is four less than twice the base angle. what is the measure of the vertex angle? \n" ); document.write( "

Algebra.Com's Answer #402203 by lwsshak3(11628) $\"\"$ $\"About$

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the vertex angle of an isosceles triangle is four less than twice the base angle. what is the measure of the vertex angle?
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\n" ); document.write( "let x=base angle
\n" ); document.write( "2x-4=vertex angle
\n" ); document.write( "sum of angles in a triangle=180º
\n" ); document.write( "2x+2x-4=180
\n" ); document.write( "4x=184
\n" ); document.write( "x=46
\n" ); document.write( "2x-4=92-4=88
\n" ); document.write( "vertex angle=88º \n" ); document.write( "

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