The problem involves a triangle ABC with the condition that $AC > AB$, and point $M$ is the midpoint of segment $BC$. There is also a point $D$ on the extension of line segment $MA$ such that $MD = MA$.

You're asked to compare the lengths of segments $AB$ and $CD$.

Let's break it down:

1. Given:

   • Triangle $ABC$, with $AC > AB$.
   • Point $M$ is the midpoint of $BC$.
   • Point $D$ lies on the extension of line $MA$, such that $MD = MA$.

2. **