Answer:
3a+16
Step-by-step explanation:
To find perimeter, you add up the lengths of all of the sides.
a+3
a+5
a+8
You would add all of the sides together to get
a+3+a+5+a+8
Let's add the numbers first
3+5+8=16
Now the letters
there are (3) As
3a
The answer is 3a+16
Hope this helps :-)
