a parallelogram with a 72 degree angle between sides of length 7 and 9 feet will be unique:
two pairs of opposite sides of length 7 and 9 feet. The angle opposite the 72 degree angle also is 72 degrees and because consecutive angles of a parallelogram are supplementary the angle next to each of the 72 degree angles will be 108 degrees.
a rectangle of perimeter 96 m will not be unique - any combination where 2*length + 2*width = 96 or length + width = 48 will work, e.g., length = 30 and width = 18 or length = 25 and width = 23.
a rhombus with angles of measure 145 and 35 will not be unique as a rhombus is defined as a parallelogram with all sides equal, so the lengths of the sides could be anything with those same angles.
a quadrilateral with 2 6cm and 2 8cm sides and a 56 degree angle will not be unique because the only requirement is that the sum of the interior angles must add up to 360, which has many possibilities given that the remaining 3 angles must add up to 360-56 = 304.
