document.write( "Question 213862: two angles of a triangle measure 15 degree and 85 degree what is the measure for the third angle \n" ); document.write( "
Algebra.Com's Answer #161545 by Immaculate(1)![]() ![]() ![]() You can put this solution on YOUR website! A whole 3 sided triangle is equal to 180 so the two angels 15 and 85 are added with the third angel (x) and equals to 180 degrees.\r \n" ); document.write( "\n" ); document.write( "15 + 85 + x = 180\r \n" ); document.write( "\n" ); document.write( "Then you add the two numbers:\r \n" ); document.write( "\n" ); document.write( "100 + x = 180\r \n" ); document.write( "\n" ); document.write( "Subtract 100 from both sides:\r \n" ); document.write( "\n" ); document.write( "100 + x = 180 \n" ); document.write( "-100 -100 \n" ); document.write( "_______________ \n" ); document.write( " x = 80 <--- And you should get 80 for the third angel! Simple is that! \n" ); document.write( " |