The illustration shows the two types of circle packing as described: square packing on the left, and hexagonal packing on the right. The square packing has more gaps between the circles, while the hexagonal arrangement shows a denser configuration with circles fitting more closely together.

Would you like more details or have any questions about the packing arrangement?

Here are five related questions you might find interesting:

1. How do you calculate the packing density for square and hexagonal arrangements?
2. What is the difference in efficiency between square and hexagonal packing?
3. Can hexagonal packing be applied to 3D objects, such as spheres?
4. How does circle packing change with different boundary shapes?
5. What real-world applications use hexagonal packing for efficiency?

Tip: Hexagonal packing is about 91% efficient, while square packing only achieves about 78.5% efficiency!