Square
triangle
circle triangle square
a triangle.
a pentagon
hexagon
at the bottom is is a square and triangle on the sides
Square.
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.
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.
A triangle a square etc.