Final answer:
To determine if parallelogram ORST is a square, we need to examine its properties. If ORST has four equal sides and four right angles, then it is a square.
Step-by-step explanation:
Lindsey and Greg have a disagreement about whether parallelogram ORST is a square. To determine who is correct, we need to examine the properties of a square. A square is a parallelogram that has four equal sides and four right angles. If ORST meets these criteria, then Lindsey is correct, otherwise, Greg is correct. The information provided should be enough to determine if ORST is a square.