I don't understand what the distance is that they are asking

Question

I don't understand what this problem is asking for, any help would be appreciated:

"Consider the spiral r = θ and a ray—emanating from the pole—that intersects the spiral. What is the distance between any two consecutive points of intersection? "

Answer 1

It's not an answer but I think the problem is to find the Distance $AB$ in the figure. Choose the line (Red) suitably.

Answer 2

The spiral $r=\theta$ looks like this:

Note: Green is based off of $r$ is negative (which is seen as not counted).

Since $\theta$ repeats every $2\pi,$ (well, it doesn't actually repeat, but $\sin$ and $\cos$ values are both the same value if $2\pi$ gets added) the answer is $2\pi.$