In both cases, we have sets of 3 quadrilaterals, such that in the first case the 3 belong to the same subset, and in B they don't.
How the shapes are sorted?
On case A, all the shapes are quadrilaterals, and the 3 figures are rhombi. So all belong to the same type of quadrilaterals, which is the type of figure with four sides, such that the opposite sides are parallel and have the same measure.
For case B we also have 3 quadrilaterals, but this time we have a rectangle, a square (which is a type of rectangle) and a non-rectangle quadrilateral. So this time, the 3 figures don't belong to the same type of quadrilaterals.
If you want to learn more about quadrilaterals, you can read:
https://brainly.com/question/16691874
