Amir sorted shapes into two groups, Group A and Group B. The task is to determine the sorting criteria. By observing the shapes and their attributes, we can discern the common characteristic within each group.

1. Problem Description

Amir sorted shapes into two groups, Group A and Group B. The task is to determine the sorting criteria. By observing the shapes and their attributes, we can discern the common characteristic within each group.

2. Solution Steps

Let's examine the shapes in Group A. The first shape is a quadrilateral with sides 5m, 9m, 5m, and 9m. The second shape is a quadrilateral with sides 3m, 4m, 5m, and 6m. The third shape is a quadrilateral with sides 6m, 6m, 8m, and 8m. All shapes in Group A are quadrilaterals with 4 sides.

Now let's look at the shapes in Group B. The first shape is a hexagon with 6 sides. The second shape is a triangle with 3 sides. The third shape is a pentagon with 5 sides. None of the shapes in Group B are quadrilaterals.

From this observation, we can conclude that Group A contains quadrilaterals, while Group B contains shapes that are not quadrilaterals.

3. Final Answer

Group A: Quadrilaterals

Group B: Not Quadrilaterals