### Home > MC1 > Chapter 2 > Lesson 2.1.1 > Problem 2-12

2-12.

Copy the dot pattern below on your paper.

Draw the 4

^{th}and 5^{th}figures.Three dots are added each time. Find where each dot is added.

How many dots would be in the 30

^{th}figure?**Explain**how you know.The thirtieth figure has

dots. Remember to explain how you know.