This is an incomplete question.
Answer:

Step-by-step explanation:
The given expression is

We group the constant terms on the right hand side to obtain;


We square both sides of the equation to remove the square root.


This will simplify to;


Answer:
The perimeter is approximately 19.
Step-by-step explanation:
Three of the sides are roughly four segments long and two are around three and a half.
4 + 4 + 4 + 3.5 + 3.5 = 19