A bike seatPyramid
a ramp is a scalene triangle
the pyramidsthe object that is shaped like a pyramid is/are paper folded by triangle and the shape that is like the shape of an pyramid is triangle.
Triangles, pyramids, and prisms can all have triangular shapes.
A star on a American flag
A dodecagon! its kind of obvious!
There are no naturally occurring objects that form a mathematically perfect triangle--the closest would be a shark's tooth or the beaks of certain species of birds. Some man-made objects that are triangular are a tent, a slice of pizza, and the pyramids.
The most famous is a stop sign.