Final answer:
To complete the flow chart and prove a property related to a coordinate system, you would need more information and specific instructions.
Step-by-step explanation:
The question is asking you to complete a flow chart to prove something related to a coordinate system. However, the provided information is not enough to determine the specific details of the flow chart. In general, to prove something in math using a coordinate system, you would need to provide the coordinates of the points involved and explain how they demonstrate the desired property or relationship. Without more context or specific instructions, it is not possible to provide a step-by-step solution.