document.write( "Question 209995: If the Perimeter of a rectangle is 40 and the diagonal is 12 find the area. \n" ); document.write( "
Algebra.Com's Answer #159160 by Tanzem(4) ![]() You can put this solution on YOUR website! 2(l+b)=40 \n" ); document.write( "l+b=20 (squaring both the sides) \n" ); document.write( "l2+b2+lb=400....1\r \n" ); document.write( "\n" ); document.write( "Now diagonal= 12 \n" ); document.write( "its right angle triangle. \n" ); document.write( "l2+b2= 144......2\r \n" ); document.write( "\n" ); document.write( "substituting 2 in 1 we get\r \n" ); document.write( "\n" ); document.write( "144+lb=400 \n" ); document.write( "lb=256 that is area \n" ); document.write( " |