Examine the parallelogram ABCD below.
Which equations below are needed to determine the measures of the interior angles of the parallelogram? Select two equations that could be used.
2x + 3= y+x
Z=y +x
2x + 3 = z
Z + y + x = 180
2x + 3 + z + y + y + x = 180
Z - y = 360
