Copy the dot pattern below on your paper. Homework Help ✎

1. Draw the 4^th and 5^th figures.

   Hint (a):

   Three dots are added each time. Find where each dot is added.

2. How many dots would be in the 30^th figure? Explain how you know.

   Answer (b):

   The thirtieth figure has $90$ dots. Remember to explain how you know.