The Great Pyramids at Giza are, but the Meso-Americans were truncated.
Chat with our AI personalities
Rohmbus is a four sided figure (quadrilateral) that is made up of two equilateral triangles
It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
Infinitely many. When you have one equilateral triangle, you can join up the midpoints of its sides to make into 4 more equilateral triangles. And then each one of those can be split up and so on.
Put the triangles in a line alternately pointing up and down.
It has a four sided square base and four other triangular sides reaching up to an apex. It is a pentahedron. If the four triangles are equilateral, it is known as a Johnson solid, and six of the pyramids will fit together to make an exact cube. If the four triangles are not equilateral, then they are isosceles.