Building Parallelograms in the Coordinate Plane (Version 2)

[size=150]Creation of this resource was inspired by this problem by [url=https://twitter.com/danieltr83]Daniel Torres-Rangel[/url] found on [url=https://www.openmiddle.com/]Open Middle[/url]'s website.[br][/size]
THE PROBLEM:
After completing the task above, use any 1 (or more) GeoGebra tools to verify that your quadrilateral IS indeed a parallelogram.
[size=150]Please explain how you know the quadrilateral you constructed above is definitely a parallelogram. [/size]
TEACHERS & STUDENTS:
[size=150]Since there are multiple solutions to this problem, below are a couple of extra extra templates in which you can also construct more solutions. [/size]
[size=150]Please explain how you know the quadrilateral you constructed above is definitely a parallelogram. [/size]
[size=150]Please explain how you know the quadrilateral you constructed above is definitely a parallelogram. [/size]
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Information: Building Parallelograms in the Coordinate Plane (Version 2)