Answer:
3rd option
Step-by-step explanation:
We first need to find the diameter of the circle.
We know this is a square because all sides are marked by a line so this means they are equal. Let find the diagonal of the square to find all parts of the square.
The diagonal of a square is
where a is the side lengths of the square.
So this means the diagonal of the square is
The diagonal is also the diameter of the main circle. The formula for circumference is
where d is the diameter.
So the diameter is
or
The third option is correct