The question asks to find $AB$ given that $AC = 10$ and $BC = 4$.

From the diagram:

• $A$, $B$, and $C$ are collinear points.
• $AC = AB + BC$.

Using this relationship, we can solve for $AB$ as follows: $AC = AB + BC$ $10 = AB + 4$ Subtract 4 from both sides: $AB = 10 - 4$ $AB = 6$

Thus, $AB = 6$.

Would you like more details or have any questions?

Here are 5 related questions to think about:

1. What is the distance formula used to find the distance between two points in a plane?
2. How do you calculate the midpoint of a line segment?
3. What is the relationship between angles and sides in a triangle?
4. Can you determine the length of any segment if you are given the total and one part of it?
5. How does this concept apply in 3D geometry?

Tip: Remember that in geometry, understanding how parts relate to the whole can simplify many problems.