document.write( "Question 777830: in triangle ABC angle A minus angle B is 15 degree angle B minus C is 30 degrees
\n" ); document.write( "find A and B \n" ); document.write( "
Algebra.Com's Answer #474293 by negative49(13)\"\" \"About 
You can put this solution on YOUR website!
sum of interior angles of triangle:
\n" ); document.write( "A° + B° + C° = 180°\r
\n" ); document.write( "\n" ); document.write( "I represent A° and C° as variable B
\n" ); document.write( "A-B = 15
\n" ); document.write( "A= 15 + B\r
\n" ); document.write( "\n" ); document.write( "B-C = 30
\n" ); document.write( "C = -30 + B\r
\n" ); document.write( "\n" ); document.write( "(15 + B) + (B) + (-30 + B) = 180
\n" ); document.write( "-15 + 3B = 180
\n" ); document.write( "3B = 195
\n" ); document.write( "B° = 65\r
\n" ); document.write( "\n" ); document.write( "A- (65) = 15
\n" ); document.write( "A = 15 + 65
\n" ); document.write( "A° = 80\r
\n" ); document.write( "\n" ); document.write( "A° = 80 B° = 65
\n" ); document.write( "Proof:
\n" ); document.write( "B-C= 30
\n" ); document.write( "C = -30 + B
\n" ); document.write( "C = -30 + 65
\n" ); document.write( "C°= 35\r
\n" ); document.write( "\n" ); document.write( "A° + B° + C° = 180°
\n" ); document.write( "80° + 65° + 35° = 180°
\n" ); document.write( " \n" ); document.write( "
\n" );