document.write( "Question 123707: One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. What is the measure of the third angle? \n" ); document.write( "
Algebra.Com's Answer #90758 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
20+4X+X=90
\n" ); document.write( "5X=90-20
\n" ); document.write( "5X=70
\n" ); document.write( "X=70/5
\n" ); document.write( "X=14 DEGREES IS THE MEASUREMENT OF THE THIRD ANGLE.
\n" ); document.write( "PROOF
\n" ); document.write( "20+4*14+14=90
\n" ); document.write( "20+56+14=90
\n" ); document.write( "90=90
\n" ); document.write( "
\n" );