The image contains a geometric figure with a complex structure and several letters marking different points. It seems to relate to a problem involving a cube, and there are several pairs of segments mentioned, such as $PQ$ and $CD$, $PS$ and $BF$, and so on, with questions regarding their lengths and comparisons.

Based on the description, it appears you need to determine relationships between various segments in the cube, possibly relating to congruence or length comparisons.

Without more context or specific points marked, I can provide some general information about properties of cubes that might be helpful:

• All edges of a cube are of equal length.
• Lines connecting opposite vertices in a cube are diagonals and are equal in length.
• Any two faces of a cube are congruent squares.

Could you please specify which relationships or properties you need to determine? Or, if you're looking for a general explanation of any particular part, feel free to specify that as well.

If you have more details or another question, please let me know!

Here are five related questions you might find interesting:

1. How do you determine if two segments in a geometric figure are congruent?
2. What are the properties of diagonals in a cube?
3. Can you explain how the Pythagorean theorem applies to finding distances in a cube?
4. What is the relationship between the edges and space diagonals of a cube?
5. How do transformations affect congruency in geometric figures?

Tip: When analyzing complex 3D geometric figures like cubes, it often helps to draw them out on graph paper, labeling all significant points,