Answer:
The area is equal to

Explanation:
we have
A(0, 0), B(2, -2), C(0, -4), D(-2, -2)
Plot the figure
The figure is a square (remember that a regular polygon has equal sides and equal internal angles)
see the attached figure
The area of the square is

Find the distance AB
the formula to calculate the distance between two points is equal to
substitute the values
Find the area of the square

