Final answer:
The term that describes the relationship of the lead lines being parallel or angled to each other is Grid pattern.
Step-by-step explanation:
The term that describes the relationship of the lead lines being parallel or angled to each other is Grid pattern. In radiography, a grid is a device used to reduce scatter radiation by absorbing it before it reaches the image receptor. The grid pattern refers to the arrangement of the lead strips in the grid, which can be parallel or angled to each other.