What should I call these straight lines in this picture(link1, link2) ? They go at the same angle.

1.

**Slanted lines**.

"slanted line" is good for a pattern.

2.

**Sloping lines**.

"sloping line" can be used in the graph of a math function, or for tangible physical things as in, "The ground sloped gently down to the stream"

But can it be used for a pattern like this?

3.

**Diagonal lines**.

"diagonal line" can mean any straight line which goes at an angle, even it doesn't join two opposite corners of a rectangle.

Are the above three choices all correct?

Thank you.