Option A:
Option D:
Step-by-step explanation:
Option A:
To find the sides of a square, let us use the distance formula,
Now, we shall find the length of the square,
Thus, the square with vertices has sides of length a.
Option B:
Now, we shall find the length of the square,
This is not a square because the lengths are not equal.
Option C:
Now, we shall find the length of the square,
Thus, the square with vertices has sides of length 2a.
Option D:
Now, we shall find the length of the square,
Thus, the square with vertices has sides of length a.
Thus, the correct answers are option a and option d.