document.write( "Question 181671: Two angles in a triangle are equal and their sum is five times the third angle in the triangle. What are the measures of each of the three interior angles? \n" ); document.write( "
Algebra.Com's Answer #136296 by Mathtut(3670)![]() ![]() ![]() You can put this solution on YOUR website! Two angles in a triangle are equal and their sum is five times the third angle in the triangle. What are the measures of each of the three interior angles? \n" ); document.write( ": \n" ); document.write( "let a, b and c be our angles \n" ); document.write( ": \n" ); document.write( "a=b.........eq 1 \n" ); document.write( "a+b=5c......eq 2 \n" ); document.write( "a+b+c=180...eq 3 \n" ); document.write( ": \n" ); document.write( "take a's value from eq 1 and plug it into eq 2.---->b+b=5c-->2b=5c-->c=(2/5)b \n" ); document.write( ": \n" ); document.write( "now take a's value from eq 1 and our new found value of c which is (2/5)b and plug those into eq 3 \n" ); document.write( ": \n" ); document.write( "b+b+(2/5)b=180 \n" ); document.write( ": \n" ); document.write( "5b+5b+2b=900.........multiplied all terms by 5 to eliminate the fraction \n" ); document.write( ": \n" ); document.write( "12b=900 \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " |