hexagon
An irregular* pentagon *means that the sides are not all the same length
Square
triangle
a triangle.
A square with a triangle on top forms a shape known as a "house" or "roof" shape. The base is the square, while the triangle serves as the roof, creating a structure that resembles a simple house design. This combination maintains the properties of both shapes, with straight edges and right angles in the square, and a pointed apex in the triangle.
An irregular* pentagon *means that the sides are not all the same length
Combining form for shape
hexagon
Square
triangle
circle triangle square
a triangle.
a pentagon
Square.
at the bottom is is a square and triangle on the sides
A square based 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.