Query about Question 9 from "(I'm Overwhelmed) Geometry Progress Quiz #5" [7776]

GRE GRE Quant Problem Solving
1

https://www.gregmat.com/quizzes/quiz/im-overwhelmed-geometry-progress-quiz-5 (Question 9)

Couldn’t there be other possible answers to this? Maybe some other length also brings perimeter equal to area

2

Try finding one.