Question 843713
Graph it and draw the diagonals.
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{{{drawing(300,300,-2,12,-2,8,grid(1),
circle(2,2,0.2),
circle(3,6,0.2),
circle(10,6,0.2),
circle(9,2,0.2),
line(2,2,3,6),
line(3,6,10,6),
line(10,6,9,2),
line(9,2,2,2),
green(circle(6,4,0.3)),
blue(line(3,6,9,2)),
blue(line(2,2,10,6)))}}}