A tent
Pup tent or lean-to
Roof tops
The Pentagon Department of defense office building
If you asking where you'd find them in the real world - Binoculars and telescopes are two examples.
The object you are describing is a triangular prism. A triangular prism has five faces: two triangular bases and three rectangular lateral faces. The two triangles are the bases of the prism, while the rectangles connect the corresponding edges of the triangles. This shape is commonly found in geometry and various real-world applications.
Pup tent or lean-to
A real life example is a Toblerone chocolate bar which is in the shape of a triangular prism.
roof
Roof of a house
tent
A solid brick is a rectangular prism. (this one example of many)
A pencil.
stuff
A basic camping tent, a house roof, and the iconic Toblerone box.
A gaming die.
Roof tops
An Amicelli box! THIS IS NOT TRUE IT IS HEXAGONAL!!