What is the perimeter of s triangle with side lengths of 5 cm, 8 cm, and 9 cm?

22 cm

Step-by-step explanation:

The perimeter is the distance all the way around a shape. To find the perimeter, add up all the sides

The side lengths are 5, 8 and 9

5+8+9=22

So, the perimeter is 22 centimeters.

The perimeter is 22

This is the answer because perimeter is the sum of all the sides added up. If you add up all the sides you get 22