Yes and it also has four 90 degree angles at each corner
There is no simple shape that has exactly 4 square sides.
A Square has 4 sides
square
square
The shape is a square.
square
A square
it is a square
square
Square.
Square
A Square has 4 sides, the shape you want that has twice as many sides as this is called a Octagon. ( Oct = 8 - as in Octopus ).