The trapezoid is indeed a quadrilateral, including one pairing of different sides that are parallel.
- The trapezoid inside the graph is symmetric about x = -1.
- In other words, draw the line at x= -1. Its trapezoid's right and left ports were mirror images of each other because x = -1.
- This reflection of force over the line x=-1 causes the trapezoidal to collapse in on itself.
Therefore, the final answer is "a reflection from across line x =-1".
Learn more about the trapezoid:
brainly.com/question/8643562