Work Step by Step
For each term that has $n$ rays, the next term has $n+(n-1)$ rays. The last figure shown has 9 rays. $9+(9-1)=9+8=17$ $17+(17-1)=17+16=33$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.