The question in the image asks which of the numbered stones cannot be mapped to another stone using a rigid motion. Rigid motion involves transformations such as translation, rotation, and reflection, but not distortion, scaling, or resizing. In this case, two stones can only be mapped to each other if they are identical in shape and size, even if rotated or reflected.

Let's analyze the shapes of the stones to identify which one(s) cannot be mapped to another stone:

• Stone 1: Has a hexagonal shape.
• Stone 2: Appears to have an irregular quadrilateral shape.
• Stone 3: Irregular quadrilateral.
• Stone 4: A small quadrilateral.
• Stone 5: Another irregular quadrilateral.
• Stone 6: Hexagonal.
• Stone 7: Rectangular.
• Stone 8: Another irregular quadrilateral.
• Stone 9: Large, nearly rectangular shape.
• Stone 10: Quadrilateral but irregular.
• Stone 11, 12, 13, 14: Various irregular quadrilaterals.

Given the variety of irregular shapes, Stones 1 and 6 both appear to be hexagonal and could potentially map to each other with rotation or reflection. However, the other stones (especially 4, 7, 9, 10, etc.) have distinct shapes and do not seem to correspond to any other stones via rigid motion. Therefore, stones like Stone 9 or Stone 7 may not be mapped to any other stone.

Would you like me to list specific stones, or further analyze any particular shape? Feel free to ask! Here are some related questions for further understanding:

1. What are the defining properties of rigid motions?
2. Can irregular shapes ever map to another shape under any transformation besides rigid motion?
3. How would introducing scaling affect the ability to map stones?
4. Could Stone 1 and Stone 6 map to each other using reflection only?
5. How can symmetry play a role in determining if two objects can be mapped?

Tip: When dealing with rigid motion, always check for congruency between the objects before checking for transformations.