document.write( "Question 1142430: calculate the angle of an isosceles triangle in which each base angle is four times the vertical angle \n" ); document.write( "

Algebra.Com's Answer #763130 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+a+\"$ = the top angle
\n" ); document.write( " $\"+4a+%2B+4a+%2B+a+=+180+\"$
\n" ); document.write( " $\"+9a+=+180+\"$
\n" ); document.write( " $\"+a+=+20+\"$
\n" ); document.write( " $\"+4a+=+80+\"$
\n" ); document.write( "The angles are 20 - 80 - 80
\n" ); document.write( "---------------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+20+%2B+80+%2B+80+=+180+\"$
\n" ); document.write( "OK \n" ); document.write( "

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