document.write( "Question 1006481: Prove that in a parallelogram the sum of the squares of the diagonals equals the sum of the squares of the four sides \n" ); document.write( "
Algebra.Com's Answer #622610 by ikleyn(52781)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "See the lesson The length of diagonals of a parallelogram in this site.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |