By definition, a quadrilateral is a two-dimensional figure that is composed of four sides. There are different kinds of quadrilateral. So, it is best to plot the given points. The graph is shown in the picture. When you connect the dots, you form a diamond. There is no need to use the distance formula to see that their distances are equal. You can already see that visually. The quadrilateral that is composed of two sets of parallel sides, with all of them have equal measure of lengths, is a rhombus.
Therefore, the given quadrilateral is a rhombus,
