square got its name from being a special square and being equal
the name of a shape with four faces is a square or rectangle.
Square.
Square
a square
A shape with a square base and four triangular sides is a pyramid.
There is no specific name because there is no specific shape. The shape could have anything from 5 to 13 sides depending on the sizes and orientations of the triangle and square.
Square
Square
square
chess board.
a square
square