# of Triangles

Perimeter

1

3

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Continue the pattern

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

What pattern do you see in the table?

 

 

 

 

 

 

 

 

If this pattern continued, what would the perimeter be for 18 triangles?  Explain how you figured this out.

 

 

 

 

 

 

Write an expression (math sentence) using numbers and symbols that describe the rule.