<prompt> Pande za sambamba hii hupima vitengo 7,9, 8y-1 na 2x3, mtawalia. Je, thamani ya xy ni nini?asychora0,0--21,0--30,25--9,25--mzunguko;lebo8y-1,10,0,S;lebo9,25.5,12.5,E;lebo7,19.5,25,N;lebo2x3,4.5,12.5,W;asy  <response>: Tunajua kwamba pande zinazopingana za parallelogramu ni sawa, kwa hivyo, tunaweza kuweka: anzaalign2x 3 98y - 1 7endalignHivyo, 2x 6 rightarrow x 3, na 8y 8 rightarrow y 1, hivyo x y 4. 