Question 1105098
the diagram shows that opposite sides are congruent.
your answer is good.
if opposite sides of a quadrilateral are congruent, the quadrilateral is a parallelogram.
here's the reference for the proff of that statement.
<a href = "https://mathbitsnotebook.com/Geometry/Quadrilaterals/QDThPf6.html" target = "_blank">https://mathbitsnotebook.com/Geometry/Quadrilaterals/QDThPf6.html</a>