document.write( "Question 413660: How would you prove a rectangle is a rectangle when all you know is that the diagonals are congruent? \n" ); document.write( "
Algebra.Com's Answer #290243 by richard1234(7193)![]() ![]() You can put this solution on YOUR website! Not all quadrilaterals with congruent diagonals are rectangles. Draw an isosceles trapezoid, and you'll see.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " |