document.write( "Question 163366: what value ab make quadrilateral abcd a parallelogram?
\n" );
document.write( " \r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #120358 by gonzo(654) ![]() You can put this solution on YOUR website! for abcd to be a parallelogram, opposite sides have to be equal and parallel to each other. \n" ); document.write( " \n" ); document.write( " |