Pyramids get their name from a long time ago. The places where the pyramids was or were are named after the king or queen who once lived there.
The Egyptian Pyramids are located in Egypt, hence their name.
Giza is where the three famous pyramids are. It is on the outskirts of Cairo.
giza
basement
Pyramids.
Bob the Builder
pyramids
Giza
The official, mathematical word for 2 pyramids attached together is a bipyramid. It is called a bipyramid because -bi means 2, and bi-pyramid means 2 pyramids.
20 miles away.
I believe what you are thinking of is an octahedron. It resembles two pyramids with square base that are joined.
Giza in Egypt.