document.write( "Question 322620: the measure of angle A is 38 less than its complement. find the measure of angle A
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #230951 by jessica43(140)![]() ![]() ![]() You can put this solution on YOUR website! The definition of complementary angles is two acute angles that add up to 90 degrees. Written as a formula:\r \n" ); document.write( "\n" ); document.write( "A+B = 90 (A= measure of angle A, B=measure of angle B, A and B are complementary)\r \n" ); document.write( "\n" ); document.write( "We also know that angle A is 38 degrees less than B. So you can also write this as a formula: \n" ); document.write( "A = B-38\r \n" ); document.write( "\n" ); document.write( "Now we can combine these formulas by plugging formula two into formula one for A and solving for B: \n" ); document.write( "A+B = 90 \n" ); document.write( "(B-38) + B = 90 \n" ); document.write( "2B - 38 = 90 \n" ); document.write( "2B = 128 \n" ); document.write( "B = 64 \n" ); document.write( "So the measure of angle B is 64 degrees. Now plug this into formula two to find A: \n" ); document.write( "A = B-38 \n" ); document.write( "A = 64-38 \n" ); document.write( "A = 26\r \n" ); document.write( "\n" ); document.write( "The measure of angle A is 26 degrees. \n" ); document.write( " |